{"id":1756,"date":"2026-04-01T17:27:53","date_gmt":"2026-04-01T17:27:53","guid":{"rendered":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/"},"modified":"2026-04-01T17:27:53","modified_gmt":"2026-04-01T17:27:53","slug":"best-practices-drawing-accurate-data-flow-diagrams","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/","title":{"rendered":"C\u00e1c Th\u1ef1c H\u00e0nh T\u1ed1t Nh\u1ea5t \u0110\u1ec3 V\u1ebd S\u01a1 \u0110\u1ed3 Lu\u1ed3ng D\u1eef Li\u1ec7u Ch\u00ednh X\u00e1c"},"content":{"rendered":"

Vi\u1ec7c t\u1ea1o ra m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Nh\u1eefng bi\u1ec3u di\u1ec5n tr\u1ef1c quan n\u00e0y m\u00f4 t\u1ea3 s\u1ef1 di chuy\u1ec3n c\u1ee7a d\u1eef li\u1ec7u qua h\u1ec7 th\u1ed1ng, l\u00e0m n\u1ed5i b\u1eadt c\u00e1c \u0111\u1ea7u v\u00e0o, \u0111\u1ea7u ra v\u00e0 l\u01b0u tr\u1eef. Khi \u0111\u01b0\u1ee3c v\u1ebd ch\u00ednh x\u00e1c, m\u1ed9t DFD \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 c\u00e1c b\u00ean li\u00ean quan, \u0111\u1ea3m b\u1ea3o m\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u hi\u1ec3u r\u00f5 logic v\u00e0 lu\u1ed3ng th\u00f4ng tin. Tuy nhi\u00ean, vi\u1ec7c t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3 ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n c\u1ee5 th\u1ec3. H\u01b0\u1edbng d\u1eabn n\u00e0y n\u00eau r\u00f5 c\u00e1c th\u1ef1c h\u00e0nh thi\u1ebft y\u1ebfu \u0111\u1ec3 v\u1ebd c\u00e1c S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m c\u1ee5 th\u1ec3.<\/p>\n

\n
\"Hand-drawn<\/figure>\n<\/div>\n

\ud83d\udd0d Hi\u1ec3u R\u00f5 M\u1ee5c \u0110\u00edch C\u1ee7a M\u1ed9t DFD<\/h2>\n

Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u v\u00ec sao nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y l\u1ea1i quan tr\u1ecdng. M\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 s\u01a1 \u0111\u1ed3 lu\u1ed3ng c\u00f4ng vi\u1ec7c. N\u00f3 kh\u00f4ng th\u1ec3 hi\u1ec7n lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n hay c\u00e1c \u0111i\u1ec3m quy\u1ebft \u0111\u1ecbnh nh\u01b0 c\u00e1c c\u00e2u l\u1ec7nh “n\u1ebfu-th\u00ec”. Thay v\u00e0o \u0111\u00f3, n\u00f3 t\u1eadp trung ho\u00e0n to\u00e0n v\u00e0o ch\u00ednh d\u1eef li\u1ec7u. N\u00f3 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi nh\u01b0: D\u1eef li\u1ec7u \u0111\u1ebfn t\u1eeb \u0111\u00e2u? D\u1eef li\u1ec7u \u0111i \u0111\u1ebfn \u0111\u00e2u? D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o? D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf \u0111\u00e2u?<\/p>\n

    \n
  • C\u00f4ng c\u1ee5 Giao ti\u1ebfp:<\/strong> N\u00f3 gi\u00fap l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ed9i k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c b\u00ean li\u00ean quan kinh doanh.<\/li>\n
  • C\u00f4ng c\u1ee5 H\u1ed7 tr\u1ee3 Ph\u00e2n t\u00edch:<\/strong> N\u00f3 gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn, d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu ho\u1eb7c c\u00e1c quy tr\u00ecnh tr\u00f9ng l\u1eb7p.<\/li>\n
  • N\u1ec1n t\u1ea3ng Thi\u1ebft k\u1ebf:<\/strong> N\u00f3 cung c\u1ea5p c\u1ea5u tr\u00fac cho thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 ki\u1ebfn tr\u00fac m\u00e3 ngu\u1ed3n.<\/li>\n<\/ul>\n

    \ud83e\uddf1 C\u00e1c Th\u00e0nh Ph\u1ea7n Ch\u00ednh C\u1ee7a M\u1ed9t DFD<\/h2>\n

    \u0110\u1ec3 v\u1ebd m\u1ed9t s\u01a1 \u0111\u1ed3 ch\u00ednh x\u00e1c, b\u1ea1n ph\u1ea3i n\u1eafm v\u1eefng b\u1ed1n k\u00fd hi\u1ec7u c\u01a1 b\u1ea3n. M\u1ed7i k\u00fd hi\u1ec7u \u0111\u1ec1u c\u00f3 \u0111\u1ecbnh ngh\u0129a nghi\u00eam ng\u1eb7t v\u00e0 ph\u1ea3i tu\u00e2n theo \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n.<\/p>\n

    1. C\u00e1c Th\u1ef1c Th\u1ec3 B\u00ean Ngo\u00e0i (Ngu\u1ed3n v\u00e0 \u0110i\u1ec3m \u0110\u1ebfn) \ud83d\udeaa<\/h3>\n

    Ch\u00fang \u0111\u1ea1i di\u1ec7n cho nh\u1eefng ng\u01b0\u1eddi, t\u1ed5 ch\u1ee9c ho\u1eb7c h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n. Ch\u00fang l\u00e0 ranh gi\u1edbi c\u1ee7a ph\u1ea1m vi c\u1ee7a b\u1ea1n. D\u1eef li\u1ec7u ch\u1ea3y v\u00e0o t\u1eeb ch\u00fang ho\u1eb7c ch\u1ea3y ra kh\u1ecfi ch\u00fang. Ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u00f3.<\/p>\n

      \n
    • V\u00ed d\u1ee5:<\/strong> M\u1ed9t Kh\u00e1ch h\u00e0ng, m\u1ed9t Nh\u00e0 cung c\u1ea5p, ho\u1eb7c m\u1ed9t C\u1ed5ng thanh to\u00e1n b\u00ean ngo\u00e0i.<\/li>\n
    • Quy t\u1eafc:<\/strong> \u0110\u1eebng nh\u1ea7m l\u1eabn ng\u01b0\u1eddi d\u00f9ng b\u00ean trong h\u1ec7 th\u1ed1ng v\u1edbi m\u1ed9t th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. Ch\u1ec9 c\u00f3 c\u00e1c ngu\u1ed3n ho\u1eb7c \u0111i\u1ec3m k\u1ebft th\u00fac b\u00ean ngo\u00e0i m\u1edbi thu\u1ed9c v\u1ec1 v\u1ecb tr\u00ed n\u00e0y.<\/li>\n<\/ul>\n

      2. C\u00e1c Quy tr\u00ecnh (Bi\u1ebfn \u0111\u1ed5i) \u2699\ufe0f<\/h3>\n

      C\u00e1c quy tr\u00ecnh l\u00e0 n\u01a1i d\u1eef li\u1ec7u thay \u0111\u1ed5i. Ch\u00fang nh\u1eadn d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o, thao t\u00e1c v\u1edbi n\u00f3 v\u00e0 t\u1ea1o ra d\u1eef li\u1ec7u \u0111\u1ea7u ra. Ch\u00fang l\u00e0 tr\u00e1i tim c\u1ee7a h\u1ec7 th\u1ed1ng. M\u1ed7i quy tr\u00ecnh ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra.<\/p>\n

        \n
      • V\u00ed d\u1ee5:<\/strong> T\u00ednh thu\u1ebf, X\u00e1c th\u1ef1c \u0111\u0103ng nh\u1eadp, T\u1ea1o b\u00e1o c\u00e1o.<\/li>\n
      • Quy t\u1eafc:<\/strong> \u0110\u1eb7t t\u00ean cho c\u00e1c quy tr\u00ecnh b\u1eb1ng \u0111\u1ed9ng t\u1eeb. M\u1ed9t quy tr\u00ecnh l\u00e0 m\u1ed9t h\u00e0nh \u0111\u1ed9ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t danh t\u1eeb.<\/li>\n<\/ul>\n

        3. C\u00e1c Kho D\u1eef Li\u1ec7u (Kho l\u01b0u tr\u1eef) \ud83d\udcc2<\/h3>\n

        C\u00e1c kho d\u1eef li\u1ec7u l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111\u1ec3 s\u1eed d\u1ee5ng sau n\u00e0y. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho c\u01a1 s\u1edf d\u1eef li\u1ec7u, c\u00e1c t\u1ec7p tin, ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 c\u00e1c t\u1ee7 h\u1ed3 s\u01a1 v\u1eadt l\u00fd. Kh\u00e1c v\u1edbi c\u00e1c quy tr\u00ecnh, c\u00e1c kho d\u1eef li\u1ec7u kh\u00f4ng thay \u0111\u1ed5i d\u1eef li\u1ec7u; ch\u00fang ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u01b0u gi\u1eef n\u00f3.<\/p>\n

          \n
        • V\u00ed d\u1ee5:<\/strong> C\u01a1 s\u1edf d\u1eef li\u1ec7u Kh\u00e1ch h\u00e0ng, Nh\u1eadt k\u00fd \u0110\u01a1n h\u00e0ng, Danh s\u00e1ch H\u00e0ng t\u1ed3n kho.<\/li>\n
        • Quy t\u1eafc:<\/strong> C\u00e1c kho d\u1eef li\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00e1c quy tr\u00ecnh. D\u1eef li\u1ec7u kh\u00f4ng th\u1ec3 t\u1ef1 nhi\u00ean xu\u1ea5t hi\u1ec7n trong ho\u1eb7c bi\u1ebfn m\u1ea5t kh\u1ecfi m\u1ed9t kho m\u00e0 kh\u00f4ng c\u00f3 m\u1ed9t quy tr\u00ecnh n\u00e0o x\u1eed l\u00fd n\u00f3.<\/li>\n<\/ul>\n

          4. Lu\u1ed3ng D\u1eef li\u1ec7u (Chuy\u1ec3n \u0111\u1ed9ng) \ud83d\udd04<\/h3>\n

          \u0110\u00e2y l\u00e0 nh\u1eefng m\u0169i t\u00ean k\u1ebft n\u1ed1i c\u00e1c th\u00e0nh ph\u1ea7n. Ch\u00fang th\u1ec3 hi\u1ec7n h\u01b0\u1edbng di chuy\u1ec3n c\u1ee7a d\u1eef li\u1ec7u. M\u1ed7i m\u0169i t\u00ean ph\u1ea3i c\u00f3 nh\u00e3n m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c d\u1eef li\u1ec7u n\u00e0o \u0111ang di chuy\u1ec3n.<\/p>\n

            \n
          • V\u00ed d\u1ee5:<\/strong>Chi ti\u1ebft \u0110\u01a1n h\u00e0ng, X\u00e1c nh\u1eadn Thanh to\u00e1n, Th\u00f4ng tin \u0110\u0103ng nh\u1eadp Ng\u01b0\u1eddi d\u00f9ng.<\/li>\n
          • Quy t\u1eafc:<\/strong>C\u00e1c m\u0169i t\u00ean n\u00ean \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n b\u1eb1ng danh t\u1eeb, kh\u00f4ng ph\u1ea3i \u0111\u1ed9ng t\u1eeb. Nh\u00e3n m\u00f4 t\u1ea3 n\u1ed9i dung c\u1ee7a lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

            \ud83d\udcc9 C\u00e1c m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng trong s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD)<\/h2>\n

            C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p kh\u00f4ng th\u1ec3 hi\u1ec3n th\u1ecb tr\u00ean m\u1ed9t trang duy nh\u1ea5t. Vi\u1ec7c chia nh\u1ecf h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c m\u1ee9c \u0111\u1ed9 l\u00e0 c\u00e1ch l\u00e0m chu\u1ea9n. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e2n r\u00e3.<\/p>\n

            M\u1ee9c \u0111\u1ed9 0: S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh \ud83c\udf0d<\/h3>\n

            S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh l\u00e0 g\u00f3c nh\u00ecn \u1edf m\u1ee9c cao nh\u1ea5t. N\u00f3 th\u1ec3 hi\u1ec7n to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng nh\u01b0 m\u1ed9t v\u00f2ng tr\u00f2n duy nh\u1ea5t. N\u00f3 k\u1ebft n\u1ed1i qu\u00e1 tr\u00ecnh duy nh\u1ea5t n\u00e0y v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. N\u00f3 x\u00e1c \u0111\u1ecbnh r\u00f5 ranh gi\u1edbi.<\/p>\n

              \n
            • Ch\u00fa tr\u1ecdng:<\/strong>Ch\u1ec9 c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra.<\/li>\n
            • Chi ti\u1ebft:<\/strong>T\u1ed1i thi\u1ec3u. Kh\u00f4ng c\u00f3 quy tr\u00ecnh n\u1ed9i b\u1ed9 hay kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

              M\u1ee9c \u0111\u1ed9 1: C\u00e1c Quy tr\u00ecnh Ch\u00ednh \ud83d\udd22<\/h3>\n

              M\u1ee9c \u0111\u1ed9 1 chia nh\u1ecf v\u00f2ng tr\u00f2n duy nh\u1ea5t trong s\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh th\u00e0nh c\u00e1c ti\u1ec3u quy tr\u00ecnh ch\u00ednh. \u0110\u00e2y l\u00e0 n\u01a1i b\u1ea1n b\u1eaft \u0111\u1ea7u th\u1ea5y \u0111\u01b0\u1ee3c logic n\u1ed9i b\u1ed9. Th\u01b0\u1eddng bao g\u1ed3m c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

                \n
              • Ch\u00fa tr\u1ecdng:<\/strong>C\u00e1c nh\u00f3m ch\u1ee9c n\u0103ng ch\u00ednh.<\/li>\n
              • Chi ti\u1ebft:<\/strong>Bao g\u1ed3m c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u ch\u00ednh v\u00e0 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c quy tr\u00ecnh ch\u00ednh.<\/li>\n<\/ul>\n

                M\u1ee9c \u0111\u1ed9 2: Ph\u00e2n t\u00edch chi ti\u1ebft \ud83d\udd0d<\/h3>\n

                M\u1ee9c \u0111\u1ed9 2 ph\u00e2n t\u00edch chi ti\u1ebft m\u1ed9t quy tr\u00ecnh c\u1ee5 th\u1ec3 t\u1eeb m\u1ee9c \u0111\u1ed9 1. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ed9t quy tr\u00ecnh c\u1ee5 th\u1ec3 qu\u00e1 ph\u1ee9c t\u1ea1p \u0111\u1ec3 hi\u1ec3u r\u00f5 \u1edf m\u1ee9c \u0111\u1ed9 1.<\/p>\n

                  \n
                • Ch\u00fa tr\u1ecdng:<\/strong>C\u00e1c thao t\u00e1c c\u1ee5 th\u1ec3, ph\u1ee9c t\u1ea1p.<\/li>\n
                • Chi ti\u1ebft:<\/strong>Chi ti\u1ebft cao. Hi\u1ec3n th\u1ecb t\u1eebng b\u01b0\u1edbc c\u1ee7a ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3 \u0111\u00f3.<\/li>\n<\/ul>\n

                  \u270d\ufe0f Quy t\u1eafc \u0110\u1eb7t T\u00ean \u0111\u1ec3 R\u00f5 R\u00e0ng<\/h2>\n

                  \u0110\u1eb7t t\u00ean l\u00e0 ngu\u1ed3n g\u00e2y nh\u1ea7m l\u1eabn ph\u1ed5 bi\u1ebfn nh\u1ea5t trong DFD. T\u00ean r\u00f5 r\u00e0ng gi\u00fap ng\u0103n ng\u1eeba hi\u1ec3u l\u1ea7m gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n

                  T\u00ean Quy tr\u00ecnh<\/h3>\n

                  Lu\u00f4n s\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ed9ng t\u1eeb theo sau l\u00e0 danh t\u1eeb. \u0110i\u1ec1u n\u00e0y m\u00f4 t\u1ea3 h\u00e0nh \u0111\u1ed9ng \u0111ang \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean d\u1eef li\u1ec7u.<\/p>\n

                    \n
                  • T\u1ed1t:<\/strong> \u201cX\u00e1c th\u1ef1c \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng\u201d<\/li>\n
                  • X\u1ea5u:<\/strong> \u201c\u0110\u0103ng nh\u1eadp\u201d ho\u1eb7c \u201cQuy tr\u00ecnh \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng\u201d<\/li>\n<\/ul>\n

                    T\u00ean lu\u1ed3ng d\u1eef li\u1ec7u<\/h3>\n

                    S\u1eed d\u1ee5ng danh t\u1eeb c\u1ee5 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho g\u00f3i d\u1eef li\u1ec7u \u0111ang di chuy\u1ec3n.<\/p>\n

                      \n
                    • T\u1ed1t:<\/strong> \u201cCh\u1ee9ng th\u1ef1c \u0111\u00e3 x\u00e1c th\u1ef1c\u201d<\/li>\n
                    • X\u1ea5u:<\/strong> \u201cD\u1eef li\u1ec7u \u0111\u0103ng nh\u1eadp\u201d ho\u1eb7c \u201cTh\u1ef1c hi\u1ec7n \u0111\u0103ng nh\u1eadp\u201d<\/li>\n<\/ul>\n

                      T\u00ean kho d\u1eef li\u1ec7u<\/h3>\n

                      S\u1eed d\u1ee5ng danh t\u1eeb \u0111\u1ea1i di\u1ec7n cho t\u1eadp h\u1ee3p d\u1eef li\u1ec7u.<\/p>\n

                        \n
                      • T\u1ed1t:<\/strong> \u201cT\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng\u201d<\/li>\n
                      • X\u1ea5u:<\/strong> \u201cNg\u01b0\u1eddi d\u00f9ng\u201d ho\u1eb7c \u201cC\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d<\/li>\n<\/ul>\n

                        \u2696\ufe0f C\u00e2n b\u1eb1ng v\u00e0 b\u1ea3o to\u00e0n d\u1eef li\u1ec7u<\/h2>\n

                        M\u1ed9t trong nh\u1eefng quy t\u1eafc quan tr\u1ecdng nh\u1ea5t trong thi\u1ebft k\u1ebf DFD l\u00e0 c\u00e2n b\u1eb1ng. Khi b\u1ea1n ph\u00e2n r\u00e3 m\u1ed9t qu\u00e1 tr\u00ecnh cha th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con, c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra ph\u1ea3i duy tr\u00ec s\u1ef1 nh\u1ea5t qu\u00e1n.<\/p>\n

                        C\u00e2n b\u1eb1ng l\u00e0 g\u00ec?<\/h3>\n

                        H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng b\u1ea1n c\u00f3 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea5p 1 g\u1ecdi l\u00e0 \u201cX\u1eed l\u00fd \u0111\u01a1n h\u00e0ng\u201d. Qu\u00e1 tr\u00ecnh n\u00e0y nh\u1eadn \u201c\u0110\u01a1n h\u00e0ng kh\u00e1ch h\u00e0ng\u201d v\u00e0 xu\u1ea5t ra \u201cX\u00e1c nh\u1eadn giao h\u00e0ng\u201d. N\u1ebfu b\u1ea1n chia nh\u1ecf \u201cX\u1eed l\u00fd \u0111\u01a1n h\u00e0ng\u201d th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con c\u1ea5p 2, th\u00ec t\u1ed5ng h\u1ee3p c\u00e1c qu\u00e1 tr\u00ecnh con \u0111\u00f3 v\u1eabn ph\u1ea3i nh\u1eadn \u201c\u0110\u01a1n h\u00e0ng kh\u00e1ch h\u00e0ng\u201d v\u00e0 t\u1ea1o ra \u201cX\u00e1c nh\u1eadn giao h\u00e0ng\u201d.<\/p>\n

                        T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng?<\/h3>\n
                          \n
                        • T\u00ednh nh\u1ea5t qu\u00e1n:<\/strong> N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u n\u00e0o b\u1ecb m\u1ea5t trong qu\u00e1 tr\u00ecnh ph\u00e2n r\u00e3.<\/li>\n
                        • Kh\u1ea3 n\u0103ng truy xu\u1ea5t:<\/strong> N\u00f3 cho ph\u00e9p b\u1ea1n truy xu\u1ea5t t\u1eebng m\u1ea3nh d\u1eef li\u1ec7u t\u1eeb c\u1ea5p cao nh\u1ea5t xu\u1ed1ng c\u1ea5p th\u1ea5p nh\u1ea5t.<\/li>\n
                        • X\u00e1c th\u1ef1c:<\/strong> N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ki\u1ec3m tra cho c\u00e1c y\u00eau c\u1ea7u b\u1ecb thi\u1ebfu.<\/li>\n<\/ul>\n

                          L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra t\u00ednh c\u00e2n b\u1eb1ng<\/h3>\n
                            \n
                          1. Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra c\u1ee7a qu\u00e1 tr\u00ecnh cha.<\/li>\n
                          2. Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra c\u1ee7a c\u00e1c qu\u00e1 tr\u00ecnh con.<\/li>\n
                          3. So s\u00e1nh hai danh s\u00e1ch. Ch\u00fang ph\u1ea3i kh\u1edbp ch\u00ednh x\u00e1c.<\/li>\n<\/ol>\n

                            \ud83d\udeab Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h2>\n

                            Ngay c\u1ea3 nh\u1eefng nh\u00e0 ph\u00e2n t\u00edch c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m. Tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y s\u1ebd c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 ch\u1ea5t l\u01b0\u1ee3ng s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n.<\/p>\n

                            1. Tr\u1ed9n l\u1eabn lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n v\u1edbi lu\u1ed3ng d\u1eef li\u1ec7u<\/h3>\n

                            S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) kh\u00f4ng ph\u1ea3i l\u00e0 s\u01a1 \u0111\u1ed3 lu\u1ed3ng. Kh\u00f4ng d\u00f9ng m\u0169i t\u00ean \u0111\u1ec3 th\u1ec3 hi\u1ec7n th\u1ee9 t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n ho\u1eb7c quy\u1ebft \u0111\u1ecbnh. N\u1ebfu m\u1ed9t quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111\u01b0a ra, d\u1eef li\u1ec7u v\u1eabn ti\u1ebfp t\u1ee5c ch\u1ea3y \u0111\u1ebfn m\u1ed9t qu\u00e1 tr\u00ecnh x\u1eed l\u00fd k\u1ebft qu\u1ea3. M\u0169i t\u00ean bi\u1ec3u di\u1ec5n d\u1eef li\u1ec7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u khi\u1ec3n.<\/p>\n

                            2. H\u1ed1 \u0111en v\u00e0 ph\u00e9p m\u00e0u<\/h3>\n
                              \n
                            • H\u1ed1 \u0111en:<\/strong> M\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 \u0111\u1ea7u v\u00e0o nh\u01b0ng kh\u00f4ng c\u00f3 \u0111\u1ea7u ra. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd d\u1eef li\u1ec7u \u0111ang bi\u1ebfn m\u1ea5t, \u0111i\u1ec1u n\u00e0y l\u00e0 v\u00f4 l\u00fd.<\/li>\n
                            • Ph\u00e9p m\u00e0u:<\/strong> M\u1ed9t qu\u00e1 tr\u00ecnh c\u00f3 \u0111\u1ea7u ra nh\u01b0ng kh\u00f4ng c\u00f3 \u0111\u1ea7u v\u00e0o. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb nowhere.<\/li>\n<\/ul>\n

                              3. C\u00e1c th\u00e0nh ph\u1ea7n kh\u00f4ng k\u1ebft n\u1ed1i<\/h3>\n

                              M\u1ecdi th\u00e0nh ph\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi \u00edt nh\u1ea5t m\u1ed9t th\u00e0nh ph\u1ea7n kh\u00e1c th\u00f4ng qua lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed9t qu\u00e1 tr\u00ecnh tr\u00f4i n\u1ed5i ho\u1eb7c m\u1ed9t kho d\u1eef li\u1ec7u t\u00e1ch bi\u1ec7t cho th\u1ea5y l\u1ed7i trong l\u1eadp lu\u1eadn.<\/p>\n

                              4. Kho d\u1eef li\u1ec7u kh\u00f4ng c\u00f3 qu\u00e1 tr\u00ecnh<\/h3>\n

                              C\u00e1c kho d\u1eef li\u1ec7u kh\u00f4ng th\u1ec3 giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi nhau. Lu\u00f4n ph\u1ea3i c\u00f3 m\u1ed9t qu\u00e1 tr\u00ecnh n\u1eb1m gi\u1eefa hai kho d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c ho\u1eb7c chuy\u1ec3n \u0111\u1ed5i tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef ho\u1eb7c truy xu\u1ea5t.<\/p>\n

                              \ud83d\udccb Danh s\u00e1ch ki\u1ec3m tra xem x\u00e9t DFD<\/h2>\n

                              S\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y \u0111\u1ec3 x\u00e1c minh c\u00f4ng vi\u1ec7c c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n s\u01a1 \u0111\u1ed3. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o ti\u00eau chu\u1ea9n \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
                              Ki\u1ec3m tra<\/th>\nTi\u00eau ch\u00ed<\/th>\n\u0110\u1ea1t\/Th\u1ea5t b\u1ea1i<\/th>\n<\/tr>\n<\/thead>\n
                              \u0110\u1eb7t t\u00ean th\u1ef1c th\u1ec3<\/td>\nT\u1ea5t c\u1ea3 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i c\u00f3 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean b\u1eb1ng danh t\u1eeb kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              \u0110\u1eb7t t\u00ean qu\u00e1 tr\u00ecnh<\/td>\nT\u1ea5t c\u1ea3 c\u00e1c qu\u00e1 tr\u00ecnh c\u00f3 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean b\u1eb1ng \u0111\u1ed9ng t\u1eeb + danh t\u1eeb kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              \u0110\u1eb7t t\u00ean lu\u1ed3ng<\/td>\nT\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u c\u00f3 \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n b\u1eb1ng danh t\u1eeb c\u1ee5 th\u1ec3 kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              B\u1ea3o to\u00e0n<\/td>\nM\u1ed7i qu\u00e1 tr\u00ecnh c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              C\u00e2n b\u1eb1ng<\/td>\nC\u00e1c s\u01a1 \u0111\u1ed3 con c\u00f3 kh\u1edbp v\u1edbi \u0111\u1ea7u v\u00e0o\/\u0111\u1ea7u ra c\u1ee7a s\u01a1 \u0111\u1ed3 cha kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              K\u1ebft n\u1ed1i<\/td>\nC\u00f3 th\u00e0nh ph\u1ea7n n\u00e0o tr\u00f4i n\u1ed5i kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              Kho d\u1eef li\u1ec7u<\/td>\nC\u00e1c kho d\u1eef li\u1ec7u c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ch\u1ec9 v\u1edbi c\u00e1c qu\u00e1 tr\u00ecnh kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n
                              C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i<\/td>\nC\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i c\u00f3 bao gi\u1edd \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 kh\u00e1c kh\u00f4ng?<\/td>\n\u2b1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              \ud83d\udd04 S\u01a1 \u0111\u1ed3 DFD logic so v\u1edbi s\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd<\/h2>\n

                              R\u1ea5t quan tr\u1ecdng khi ph\u00e2n bi\u1ec7t gi\u1eefa quan \u0111i\u1ec3m logic c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 quan \u0111i\u1ec3m v\u1eadt l\u00fd. C\u1ea3 hai \u0111\u1ec1u h\u1ee3p l\u1ec7, nh\u01b0ng ch\u00fang ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau.<\/p>\n

                              S\u01a1 \u0111\u1ed3 DFD logic<\/h3>\n

                              \u0110i\u1ec1u n\u00e0y t\u1eadp trung v\u00e0o c\u00e1c y\u00eau c\u1ea7u kinh doanh. N\u00f3 b\u1ecf qua c\u00e1ch h\u1ec7 th\u1ed1ng th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng. N\u00f3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi \u201cDoanh nghi\u1ec7p l\u00e0m g\u00ec?\u201d<\/p>\n

                                \n
                              • V\u00ed d\u1ee5:<\/strong> \u201cX\u1eed l\u00fd thanh to\u00e1n\u201d l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh.<\/li>\n
                              • L\u1ee3i \u00edch:<\/strong> N\u00f3 v\u1eabn h\u1ee3p l\u1ec7 ngay c\u1ea3 khi c\u00f4ng ngh\u1ec7 thay \u0111\u1ed5i.<\/li>\n<\/ul>\n

                                S\u01a1 \u0111\u1ed3 DFD v\u1eadt l\u00fd<\/h3>\n

                                \u0110i\u1ec1u n\u00e0y t\u1eadp trung v\u00e0o tri\u1ec3n khai. N\u00f3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi \u201cH\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng nh\u01b0 th\u1ebf n\u00e0o?\u201d N\u00f3 bao g\u1ed3m ph\u1ea7n c\u1ee9ng c\u1ee5 th\u1ec3, c\u00e1c m\u00f4-\u0111un ph\u1ea7n m\u1ec1m ho\u1eb7c c\u00e1c nhi\u1ec7m v\u1ee5 th\u1ee7 c\u00f4ng.<\/p>\n

                                  \n
                                • V\u00ed d\u1ee5:<\/strong> \u201cCh\u1ea1y API Th\u1ebb t\u00edn d\u1ee5ng\u201d ho\u1eb7c \u201cIn h\u00f3a \u0111\u01a1n tr\u00ean m\u00e1y in laser\u201d.<\/li>\n
                                • L\u1ee3i \u00edch:<\/strong> N\u00f3 h\u01b0\u1edbng d\u1eabn tr\u1ef1c ti\u1ebfp cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 k\u1ef9 s\u01b0.<\/li>\n<\/ul>\n

                                  \ud83e\udd1d Tham gia c\u1ee7a c\u00e1c b\u00ean li\u00ean quan<\/h2>\n

                                  S\u01a1 \u0111\u1ed3 DFD l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 giao ti\u1ebfp. N\u00f3 v\u00f4 d\u1ee5ng n\u1ebfu c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng hi\u1ec3u n\u00f3 ho\u1eb7c n\u1ebfu n\u00f3 kh\u00f4ng ph\u1ea3n \u00e1nh th\u1ef1c t\u1ebf c\u1ee7a h\u1ecd.<\/p>\n

                                    \n
                                  • C\u00e1c bu\u1ed5i tr\u00ecnh b\u00e0y:<\/strong> L\u00ean l\u1ecbch c\u00e1c bu\u1ed5i h\u1ecdp n\u01a1i b\u1ea1n d\u1eabn d\u1eaft c\u00e1c b\u00ean li\u00ean quan qua s\u01a1 \u0111\u1ed3 t\u1eebng b\u01b0\u1edbc m\u1ed9t.<\/li>\n
                                  • V\u00f2ng ph\u1ea3n h\u1ed3i:<\/strong>Cho ph\u00e9p c\u00e1c b\u00ean li\u00ean quan ch\u1ec9 ra c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u b\u1ecb thi\u1ebfu ho\u1eb7c t\u00ean quy tr\u00ecnh sai.<\/li>\n
                                  • X\u00e1c nh\u1eadn:<\/strong>\u0110\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 ph\u00f9 h\u1ee3p v\u1edbi m\u00f4 h\u00ecnh t\u01b0 duy c\u1ee7a h\u1ecd v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a doanh nghi\u1ec7p.<\/li>\n<\/ul>\n

                                    Khi c\u00e1c b\u00ean li\u00ean quan x\u00e1c nh\u1eadn s\u01a1 \u0111\u1ed3, n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t lo\u1ea1i h\u1ee3p \u0111\u1ed3ng. \u0110i\u1ec1u n\u00e0y x\u00e1c nh\u1eadn r\u1eb1ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111\u00e1p \u1ee9ng nhu c\u1ea7u kinh doanh. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m r\u1ee7i ro ph\u1ea3i l\u00e0m l\u1ea1i c\u00f4ng vi\u1ec7c trong giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n sau n\u00e0y.<\/p>\n

                                    \ud83d\udee0\ufe0f B\u1ea3o tr\u00ec s\u01a1 \u0111\u1ed3 theo th\u1eddi gian<\/h2>\n

                                    H\u1ec7 th\u1ed1ng thay \u0111\u1ed5i theo th\u1eddi gian. Y\u00eau c\u1ea7u c\u0169ng thay \u0111\u1ed5i. M\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) ch\u00ednh x\u00e1c h\u00f4m qua c\u00f3 th\u1ec3 \u0111\u00e3 l\u1ed7i th\u1eddi h\u00f4m nay. \u0110\u1ec3 duy tr\u00ec gi\u00e1 tr\u1ecb c\u1ee7a t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n, b\u1ea1n ph\u1ea3i th\u01b0\u1eddng xuy\u00ean c\u1eadp nh\u1eadt n\u00f3.<\/p>\n

                                      \n
                                    • Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong>Gi\u1eef h\u1ed3 s\u01a1 c\u00e1c phi\u00ean b\u1ea3n kh\u00e1c nhau c\u1ee7a s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ec3 theo d\u00f5i c\u00e1c thay \u0111\u1ed5i theo th\u1eddi gian.<\/li>\n
                                    • C\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u00edch ho\u1ea1t c\u1eadp nh\u1eadt:<\/strong>Thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc v\u1ec1 khi n\u00e0o c\u1ea7n c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (v\u00ed d\u1ee5: y\u00eau c\u1ea7u t\u00ednh n\u0103ng m\u1edbi, thay \u0111\u1ed5i quy tr\u00ecnh).<\/li>\n
                                    • Kho l\u01b0u tr\u1eef trung t\u00e2m:<\/strong>L\u01b0u tr\u1eef s\u01a1 \u0111\u1ed3 t\u1ea1i m\u1ed9t v\u1ecb tr\u00ed c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c b\u1edfi to\u00e0n b\u1ed9 \u0111\u1ed9i ng\u0169.<\/li>\n<\/ul>\n

                                      \ud83d\udd0e T\u00ecm hi\u1ec3u s\u00e2u: X\u1eed l\u00fd c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p<\/h2>\n

                                      \u0110\u00f4i khi, c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u r\u1ea5t ph\u1ee9c t\u1ea1p. Ch\u00fang c\u00f3 th\u1ec3 mang theo nhi\u1ec1u th\u00f4ng tin kh\u00e1c nhau ho\u1eb7c thay \u0111\u1ed5i t\u00f9y theo \u0111i\u1ec1u ki\u1ec7n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch x\u1eed l\u00fd ch\u00fang m\u00e0 kh\u00f4ng l\u00e0m r\u1ed1i s\u01a1 \u0111\u1ed3.<\/p>\n

                                      Gom d\u1eef li\u1ec7u<\/h3>\n

                                      Kh\u00f4ng v\u1ebd m\u1ed9t m\u0169i t\u00ean cho t\u1eebng tr\u01b0\u1eddng d\u1eef li\u1ec7u ri\u00eang l\u1ebb. Gom c\u00e1c d\u1eef li\u1ec7u li\u00ean quan v\u00e0o m\u1ed9t g\u00f3i h\u1ee3p l\u00fd.<\/p>\n

                                        \n
                                      • V\u00ed d\u1ee5:<\/strong>Thay v\u00ec v\u1ebd c\u00e1c m\u0169i t\u00ean ri\u00eang bi\u1ec7t cho \u201cT\u00ean\u201d, \u201c\u0110\u1ecba ch\u1ec9\u201d v\u00e0 \u201cS\u1ed1 \u0111i\u1ec7n tho\u1ea1i\u201d, h\u00e3y v\u1ebd m\u1ed9t m\u0169i t\u00ean \u0111\u01b0\u1ee3c ghi nh\u00e3n l\u00e0 \u201cTh\u00f4ng tin kh\u00e1ch h\u00e0ng\u201d.<\/li>\n<\/ul>\n

                                        Lu\u1ed3ng \u0111i\u1ec1u ki\u1ec7n<\/h3>\n

                                        M\u1eb7c d\u00f9 s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) th\u01b0\u1eddng kh\u00f4ng th\u1ec3 hi\u1ec7n logic ra quy\u1ebft \u0111\u1ecbnh, \u0111\u00f4i khi d\u1eef li\u1ec7u ch\u1ec9 di chuy\u1ec3n trong m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh. B\u1ea1n c\u00f3 th\u1ec3 ghi nh\u00e3n m\u0169i t\u00ean \u0111\u1ec3 ch\u1ec9 ra \u0111i\u1ec1u n\u00e0y.<\/p>\n

                                          \n
                                        • V\u00ed d\u1ee5:<\/strong>Ghi nh\u00e3n m\u1ed9t m\u0169i t\u00ean l\u00e0 \u201c\u0110\u01a1n h\u00e0ng \u0111\u00e3 \u0111\u01b0\u1ee3c duy\u1ec7t\u201d \u0111\u1ec3 ph\u00e2n bi\u1ec7t v\u1edbi \u201c\u0110\u01a1n h\u00e0ng b\u1ecb t\u1eeb ch\u1ed1i\u201d.<\/li>\n<\/ul>\n

                                          \ud83d\udcdd C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 t\u00e0i li\u1ec7u h\u00f3a<\/h2>\n

                                          S\u01a1 \u0111\u1ed3 ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e2u chuy\u1ec7n. B\u1ea1n ph\u1ea3i t\u00e0i li\u1ec7u h\u00f3a \u0111\u1ecbnh ngh\u0129a c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 r\u00f5 r\u00e0ng.<\/p>\n

                                            \n
                                          • T\u1eeb \u0111i\u1ec3n:<\/strong>T\u1ea1o m\u1ed9t t\u1eeb \u0111i\u1ec3n cho t\u1ea5t c\u1ea3 c\u00e1c thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u01a1 \u0111\u1ed3 (v\u00ed d\u1ee5: \u0111i\u1ec1u g\u00ec \u0111\u1ecbnh ngh\u0129a m\u1ed9t \u201cNg\u01b0\u1eddi d\u00f9ng \u0111\u00e3 x\u00e1c th\u1ef1c\u201d?).<\/li>\n
                                          • M\u00f4 t\u1ea3 quy tr\u00ecnh:<\/strong>\u0110\u1ed1i v\u1edbi c\u00e1c quy tr\u00ecnh ph\u1ee9c t\u1ea1p, h\u00e3y vi\u1ebft m\u1ed9t m\u00f4 t\u1ea3 ng\u1eafn v\u1ec1 logic li\u00ean quan.<\/li>\n
                                          • T\u1eeb \u0111i\u1ec3n d\u1eef li\u1ec7u:<\/strong> X\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0 lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

                                            T\u00e0i li\u1ec7u h\u1ed7 tr\u1ee3 s\u01a1 \u0111\u1ed3. N\u00f3 cung c\u1ea5p b\u1ed1i c\u1ea3nh c\u1ea7n thi\u1ebft m\u00e0 c\u00e1c k\u00fd hi\u1ec7u tr\u1ef1c quan kh\u00f4ng th\u1ec3 truy\u1ec1n \u0111\u1ea1t. Kh\u00f4ng c\u00f3 n\u00f3, s\u01a1 \u0111\u1ed3 s\u1ebd d\u1ec5 b\u1ecb hi\u1ec3u theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau.<\/p>\n

                                            \ud83c\udfaf T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/h2>\n

                                            C\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean t\u00ednh nh\u1ea5t qu\u00e1n, s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c quy t\u1eafc. B\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1c th\u1ef1c h\u00e0nh \u0111\u01b0\u1ee3c n\u00eau \u1edf \u0111\u00e2y, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 truy\u1ec1n \u0111\u1ea1t logic h\u1ec7 th\u1ed1ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n

                                              \n
                                            • T\u1eadp trung v\u00e0o d\u1eef li\u1ec7u:<\/strong>Gi\u1eef s\u1ef1 t\u1eadp trung v\u00e0o chuy\u1ec3n \u0111\u1ed9ng d\u1eef li\u1ec7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n.<\/li>\n
                                            • S\u1eed d\u1ee5ng t\u00ean g\u1ecdi nh\u1ea5t qu\u00e1n:<\/strong>\u0110\u1ed9ng t\u1eeb cho c\u00e1c qu\u00e1 tr\u00ecnh, danh t\u1eeb cho d\u1eef li\u1ec7u.<\/li>\n
                                            • Ph\u00e2n t\u00edch c\u1ea9n th\u1eadn:<\/strong>Duy tr\u00ec s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c c\u1ea5p \u0111\u1ed9.<\/li>\n
                                            • X\u00e1c minh v\u1edbi c\u00e1c b\u00ean li\u00ean quan:<\/strong>\u0110\u1ea3m b\u1ea3o m\u00f4 h\u00ecnh ph\u1ea3n \u00e1nh \u0111\u00fang th\u1ef1c t\u1ebf.<\/li>\n
                                            • T\u00e0i li\u1ec7u \u0111\u1ea7y \u0111\u1ee7:<\/strong>Cung c\u1ea5p b\u1ed1i c\u1ea3nh \u0111i k\u00e8m v\u1edbi h\u00ecnh \u1ea3nh tr\u1ef1c quan.<\/li>\n<\/ul>\n

                                              \u0110\u1ea7u t\u01b0 th\u1eddi gian \u0111\u1ec3 v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch b\u1eb1ng c\u00e1ch gi\u1ea3m thi\u1ec3u l\u1ed7i ph\u00e1t tri\u1ec3n v\u00e0 giao ti\u1ebfp r\u00f5 r\u00e0ng h\u01a1n. \u0110i\u1ec1u n\u00e0y t\u1ea1o n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho b\u1ea5t k\u1ef3 d\u1ef1 \u00e1n ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng n\u00e0o.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                              Vi\u1ec7c t\u1ea1o ra m\u1ed9t S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u (DFD) l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Nh\u1eefng bi\u1ec3u di\u1ec5n tr\u1ef1c quan n\u00e0y m\u00f4 t\u1ea3…<\/p>\n","protected":false},"author":1,"featured_media":1757,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[96],"tags":[89,95],"class_list":["post-1756","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dfd","tag-academic","tag-dfd"],"yoast_head":"\nC\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)\" \/>\n<meta property=\"og:description\" content=\"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\" \/>\n<meta property=\"og:site_name\" content=\"Viz Note Vietnamese - AI Insights & Software Industry Updates\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-01T17:27:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1664\" \/>\n\t<meta property=\"og:image:height\" content=\"928\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"vpadmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"vpadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"21 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\"},\"author\":{\"name\":\"vpadmin\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/d69595112293b803501f7b381be28255\"},\"headline\":\"C\u00e1c Th\u1ef1c H\u00e0nh T\u1ed1t Nh\u1ea5t \u0110\u1ec3 V\u1ebd S\u01a1 \u0110\u1ed3 Lu\u1ed3ng D\u1eef Li\u1ec7u Ch\u00ednh X\u00e1c\",\"datePublished\":\"2026-04-01T17:27:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\"},\"wordCount\":4308,\"publisher\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg\",\"keywords\":[\"academic\",\"dfd\"],\"articleSection\":[\"DFD\"],\"inLanguage\":\"vi\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\",\"url\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\",\"name\":\"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)\",\"isPartOf\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg\",\"datePublished\":\"2026-04-01T17:27:53+00:00\",\"description\":\"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#breadcrumb\"},\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage\",\"url\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg\",\"contentUrl\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg\",\"width\":1664,\"height\":928},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.viz-note.com\/vi\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C\u00e1c Th\u1ef1c H\u00e0nh T\u1ed1t Nh\u1ea5t \u0110\u1ec3 V\u1ebd S\u01a1 \u0110\u1ed3 Lu\u1ed3ng D\u1eef Li\u1ec7u Ch\u00ednh X\u00e1c\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#website\",\"url\":\"https:\/\/www.viz-note.com\/vi\/\",\"name\":\"Viz Note Vietnamese - AI Insights & Software Industry Updates\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.viz-note.com\/vi\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"vi\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#organization\",\"name\":\"Viz Note Vietnamese - AI Insights & Software Industry Updates\",\"url\":\"https:\/\/www.viz-note.com\/vi\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2025\/03\/cropped-viz-note-logo.png\",\"contentUrl\":\"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2025\/03\/cropped-viz-note-logo.png\",\"width\":512,\"height\":512,\"caption\":\"Viz Note Vietnamese - AI Insights & Software Industry Updates\"},\"image\":{\"@id\":\"https:\/\/www.viz-note.com\/vi\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/d69595112293b803501f7b381be28255\",\"name\":\"vpadmin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g\",\"caption\":\"vpadmin\"},\"sameAs\":[\"https:\/\/www.viz-note.com\"],\"url\":\"https:\/\/www.viz-note.com\/vi\/author\/vpadmin\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)","description":"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/","og_locale":"vi_VN","og_type":"article","og_title":"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)","og_description":"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.","og_url":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/","og_site_name":"Viz Note Vietnamese - AI Insights & Software Industry Updates","article_published_time":"2026-04-01T17:27:53+00:00","og_image":[{"width":1664,"height":928,"url":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg","type":"image\/jpeg"}],"author":"vpadmin","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"vpadmin","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"21 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#article","isPartOf":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/"},"author":{"name":"vpadmin","@id":"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/d69595112293b803501f7b381be28255"},"headline":"C\u00e1c Th\u1ef1c H\u00e0nh T\u1ed1t Nh\u1ea5t \u0110\u1ec3 V\u1ebd S\u01a1 \u0110\u1ed3 Lu\u1ed3ng D\u1eef Li\u1ec7u Ch\u00ednh X\u00e1c","datePublished":"2026-04-01T17:27:53+00:00","mainEntityOfPage":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/"},"wordCount":4308,"publisher":{"@id":"https:\/\/www.viz-note.com\/vi\/#organization"},"image":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage"},"thumbnailUrl":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg","keywords":["academic","dfd"],"articleSection":["DFD"],"inLanguage":"vi"},{"@type":"WebPage","@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/","url":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/","name":"C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c (DFD)","isPartOf":{"@id":"https:\/\/www.viz-note.com\/vi\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage"},"image":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage"},"thumbnailUrl":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg","datePublished":"2026-04-01T17:27:53+00:00","description":"H\u1ecdc c\u00e1ch v\u1ebd c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c. C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, th\u00e0nh ph\u1ea7n, c\u1ea5p \u0111\u1ed9 v\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn cho ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.","breadcrumb":{"@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/"]}]},{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#primaryimage","url":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg","contentUrl":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2026\/04\/data-flow-diagram-best-practices-whiteboard-infographic.jpg","width":1664,"height":928},{"@type":"BreadcrumbList","@id":"https:\/\/www.viz-note.com\/vi\/best-practices-drawing-accurate-data-flow-diagrams\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.viz-note.com\/vi\/"},{"@type":"ListItem","position":2,"name":"C\u00e1c Th\u1ef1c H\u00e0nh T\u1ed1t Nh\u1ea5t \u0110\u1ec3 V\u1ebd S\u01a1 \u0110\u1ed3 Lu\u1ed3ng D\u1eef Li\u1ec7u Ch\u00ednh X\u00e1c"}]},{"@type":"WebSite","@id":"https:\/\/www.viz-note.com\/vi\/#website","url":"https:\/\/www.viz-note.com\/vi\/","name":"Viz Note Vietnamese - AI Insights & Software Industry Updates","description":"","publisher":{"@id":"https:\/\/www.viz-note.com\/vi\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.viz-note.com\/vi\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"},{"@type":"Organization","@id":"https:\/\/www.viz-note.com\/vi\/#organization","name":"Viz Note Vietnamese - AI Insights & Software Industry Updates","url":"https:\/\/www.viz-note.com\/vi\/","logo":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/www.viz-note.com\/vi\/#\/schema\/logo\/image\/","url":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2025\/03\/cropped-viz-note-logo.png","contentUrl":"https:\/\/www.viz-note.com\/vi\/wp-content\/uploads\/sites\/10\/2025\/03\/cropped-viz-note-logo.png","width":512,"height":512,"caption":"Viz Note Vietnamese - AI Insights & Software Industry Updates"},"image":{"@id":"https:\/\/www.viz-note.com\/vi\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/d69595112293b803501f7b381be28255","name":"vpadmin","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/www.viz-note.com\/vi\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/56e0eb902506d9cea7c7e209205383146b8e81c0ef2eff693d9d5e0276b3d7e3?s=96&d=mm&r=g","caption":"vpadmin"},"sameAs":["https:\/\/www.viz-note.com"],"url":"https:\/\/www.viz-note.com\/vi\/author\/vpadmin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/posts\/1756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/comments?post=1756"}],"version-history":[{"count":0,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/posts\/1756\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/media\/1757"}],"wp:attachment":[{"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/media?parent=1756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/categories?post=1756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.viz-note.com\/vi\/wp-json\/wp\/v2\/tags?post=1756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}