{"id":1798,"date":"2026-03-28T15:15:38","date_gmt":"2026-03-28T15:15:38","guid":{"rendered":"https:\/\/www.viz-note.com\/vi\/data-flow-diagrams-effectively\/"},"modified":"2026-03-28T15:15:38","modified_gmt":"2026-03-28T15:15:38","slug":"data-flow-diagrams-effectively","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/vi\/data-flow-diagrams-effectively\/","title":{"rendered":"T\u1eeb Kh\u00e1i Ni\u1ec7m \u0111\u1ebfn M\u00e3 H\u00f3a: S\u1eed d\u1ee5ng S\u01a1 \u0111\u1ed3 D\u00f2ng D\u1eef li\u1ec7u Hi\u1ec7u Qu\u1ea3"},"content":{"rendered":"

Trong ki\u1ebfn tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, s\u1ef1 r\u00f5 r\u00e0ng l\u00e0 \u0111\u1ed3ng ti\u1ec1n c\u1ee7a th\u00e0nh c\u00f4ng. Tr\u01b0\u1edbc khi vi\u1ebft b\u1ea5t k\u1ef3 d\u00f2ng logic n\u00e0o, vi\u1ec7c di chuy\u1ec3n th\u00f4ng tin ph\u1ea3i \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac s\u01a1 \u0111\u1ed3 d\u00f2ng d\u1eef li\u1ec7u (DFD) tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 thi\u1ebfu. M\u1ed9t DFD tr\u1ef1c quan h\u00f3a c\u00e1ch d\u1eef li\u1ec7u nh\u1eadp v\u00e0o h\u1ec7 th\u1ed1ng, c\u00e1ch n\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i, n\u01a1i n\u00f3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 c\u00e1ch n\u00f3 tho\u00e1t ra. \u0110\u00f3 l\u00e0 b\u1ea3n v\u1ebd c\u1ea5u tr\u00fac t\u00e1ch bi\u1ec7t gi\u1eefa “c\u00e1i g\u00ec” v\u00e0 “c\u00e1ch th\u1ee9c”. Kh\u00e1c v\u1edbi m\u00e3 ngu\u1ed3n, v\u1ed1n quy \u0111\u1ecbnh chi ti\u1ebft tri\u1ec3n khai c\u1ee5 th\u1ec3, m\u1ed9t DFD t\u1eadp trung v\u00e0o lu\u1ed3ng logic c\u1ee7a th\u00f4ng tin tr\u00ean to\u00e0n b\u1ed9 h\u1ec7 sinh th\u00e1i.<\/p>\n

Nhi\u1ec1u nh\u00f3m v\u1ed9i v\u00e0ng b\u01b0\u1edbc v\u00e0o m\u00e3 h\u00f3a m\u00e0 kh\u00f4ng c\u00f3 bi\u1ec3u di\u1ec5n tr\u1ef1c quan v\u1eefng ch\u1eafc v\u1ec1 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn logic h\u1ed7n \u0111\u1ed9n, c\u00e1c truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p v\u00e0 c\u00e1c giao di\u1ec7n kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi quy tr\u00ecnh kinh doanh. B\u1eb1ng c\u00e1ch th\u00e0nh th\u1ea1o vi\u1ec7c x\u00e2y d\u1ef1ng v\u00e0 di\u1ec5n gi\u1ea3i c\u00e1c s\u01a1 \u0111\u1ed3 DFD, c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 \u0111\u1ea3m b\u1ea3o n\u1ec1n t\u1ea3ng c\u1ee7a h\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 \u0111\u00fang m\u1ee5c \u0111\u00edch \u0111\u00e3 \u0111\u1ecbnh. H\u01b0\u1edbng d\u1eabn n\u00e0y chi ti\u1ebft v\u1ec1 c\u01a1 ch\u1ebf, quy t\u1eafc v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7u qu\u1ea3, n\u1ed1i li\u1ec1n kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c y\u00eau c\u1ea7u tr\u1eebu t\u01b0\u1ee3ng v\u00e0 tri\u1ec3n khai c\u1ee5 th\u1ec3.<\/p>\n

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\"Chalkboard-style<\/figure>\n<\/div>\n

\ud83e\udde9 Hi\u1ec3u R\u00f5 C\u00e1c Th\u00e0nh Ph\u1ea7n Ch\u00ednh c\u1ee7a S\u01a1 \u0111\u1ed3 D\u00f2ng D\u1eef li\u1ec7u<\/h2>\n

S\u01a1 \u0111\u1ed3 d\u00f2ng d\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u qua m\u1ed9t h\u1ec7 th\u1ed1ng th\u00f4ng tin. N\u00f3 kh\u00f4ng th\u1ec3 hi\u1ec7n lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n, nh\u01b0 v\u00f2ng l\u1eb7p hay nh\u00e1nh quy\u1ebft \u0111\u1ecbnh, m\u00e0 ch\u1ec9 th\u1ec3 hi\u1ec7n ch\u00ednh d\u1eef li\u1ec7u. \u0110\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t s\u01a1 \u0111\u1ed3 h\u1ee3p l\u1ec7, ng\u01b0\u1eddi ta ph\u1ea3i hi\u1ec3u r\u00f5 b\u1ed1n k\u00fd hi\u1ec7u c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong k\u00fd hi\u1ec7u chu\u1ea9n.<\/p>\n

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  • Quy tr\u00ecnh:<\/strong>\u0110\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng h\u00ecnh tr\u00f2n ho\u1eb7c h\u00ecnh ch\u1eef nh\u1eadt bo tr\u00f2n, m\u1ed9t quy tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o th\u00e0nh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ea7u ra. N\u00f3 \u0111\u1ea1i di\u1ec7n cho s\u1ef1 thay \u0111\u1ed5i, t\u00ednh to\u00e1n ho\u1eb7c t\u1ed5ng h\u1ee3p. M\u1ed9t quy tr\u00ecnh kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp; n\u00f3 ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u0111\u1ea7u v\u00e0o v\u00e0 m\u1ed9t \u0111\u1ea7u ra.<\/li>\n
  • Kho d\u1eef li\u1ec7u:<\/strong>Hi\u1ec7n th\u1ecb d\u01b0\u1edbi d\u1ea1ng h\u00ecnh ch\u1eef nh\u1eadt m\u1edf ho\u1eb7c c\u00e1c \u0111\u01b0\u1eddng song song, k\u00fd hi\u1ec7u n\u00e0y \u0111\u1ea1i di\u1ec7n cho m\u1ed9t kho ch\u1ee9a d\u1eef li\u1ec7u. \u0110\u00f3 l\u00e0 b\u1ed9 nh\u1edb th\u1ee5 \u0111\u1ed9ng n\u01a1i d\u1eef li\u1ec7u n\u1eb1m ch\u1edd gi\u1eefa c\u00e1c quy tr\u00ecnh. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m b\u1ea3ng c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u1eadp tin ph\u1eb3ng ho\u1eb7c b\u1ed9 nh\u1edb \u0111\u1ec7m trong b\u1ed9 nh\u1edb.<\/li>\n
  • Th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i:<\/strong>C\u0169ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111i\u1ec3m k\u1ebft th\u00fac, \u0111\u00e2y l\u00e0 m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u n\u1eb1m ngo\u00e0i ranh gi\u1edbi h\u1ec7 th\u1ed1ng. N\u00f3 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t ng\u01b0\u1eddi d\u00f9ng, m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb v\u1eadt l\u00fd.<\/li>\n
  • Lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong>Tr\u00ecnh b\u00e0y d\u01b0\u1edbi d\u1ea1ng m\u1ed9t \u0111\u01b0\u1eddng c\u00f3 m\u0169i t\u00ean, \u0111i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n. N\u00f3 \u0111\u1ea1i di\u1ec7n cho ch\u00ednh d\u1eef li\u1ec7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u00edn hi\u1ec7u v\u1eadt l\u00fd. M\u1ed7i lu\u1ed3ng ph\u1ea3i c\u00f3 nh\u00e3n c\u00f3 \u00fd ngh\u0129a m\u00f4 t\u1ea3 n\u1ed9i dung.<\/li>\n<\/ul>\n

    Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. V\u00ed d\u1ee5, m\u1ed9t l\u1ed7i ph\u1ed5 bi\u1ebfn l\u00e0 v\u1ebd m\u1ed9t lu\u1ed3ng d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp t\u1eeb m\u1ed9t th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i sang th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i kh\u00e1c, b\u1ecf qua h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd r\u1eb1ng h\u1ec7 th\u1ed1ng kh\u00f4ng x\u1eed l\u00fd d\u1eef li\u1ec7u, vi ph\u1ea1m ph\u1ea1m vi ph\u00e2n t\u00edch. T\u01b0\u01a1ng t\u1ef1, k\u1ebft n\u1ed1i kho d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp v\u1edbi m\u1ed9t th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i m\u00e0 kh\u00f4ng c\u00f3 quy tr\u00ecnh th\u00ec ng\u1ee5 \u00fd truy c\u1eadp tr\u00e1i ph\u00e9p ho\u1eb7c thi\u1ebfu ki\u1ec3m so\u00e1t.<\/p>\n

    \ud83d\udcc9 Th\u1ee9 b\u1eadc c\u1ee7a C\u00e1c M\u1ee9c DFD<\/h2>\n

    S\u01a1 \u0111\u1ed3 d\u00f2ng d\u1eef li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 t\u0129nh; ch\u00fang c\u00f3 c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u00f4 t\u1ea3 h\u1ec7 th\u1ed1ng t\u1eeb c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao xu\u1ed1ng chi ti\u1ebft c\u1ee5 th\u1ec3. Vi\u1ec7c ph\u00e2n r\u00e3 n\u00e0y gi\u00fap qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch chia h\u1ec7 th\u1ed1ng th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf d\u1ec5 qu\u1ea3n l\u00fd. C\u00f3 ba m\u1ee9c ph\u00e2n r\u00e3 ch\u00ednh.<\/p>\n

    1. S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh (M\u1ee9c 0)<\/h3>\n

    S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh cung c\u1ea5p m\u1ee9c tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t. N\u00f3 m\u00f4 t\u1ea3 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng nh\u01b0 m\u1ed9t quy tr\u00ecnh duy nh\u1ea5t v\u00e0 th\u1ec3 hi\u1ec7n s\u1ef1 t\u01b0\u01a1ng t\u00e1c c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i. S\u01a1 \u0111\u1ed3 n\u00e0y tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: “H\u1ec7 th\u1ed1ng l\u00e0 g\u00ec?” N\u00f3 h\u1eefu \u00edch cho c\u00e1c b\u00ean li\u00ean quan c\u1ea7n m\u1ed9t c\u00e1i nh\u00ecn t\u1ed5ng quan nhanh m\u00e0 kh\u00f4ng b\u1ecb m\u1eafc k\u1eb9t v\u00e0o chi ti\u1ebft n\u1ed9i b\u1ed9.<\/p>\n

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    • Ph\u1ea1m vi:<\/strong>M\u1ed9t quy tr\u00ecnh trung t\u00e2m \u0111\u1ea1i di\u1ec7n cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/li>\n
    • Th\u00e0nh ph\u1ea7n:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c ngu\u1ed3n v\u00e0 \u0111\u00edch b\u00ean ngo\u00e0i.<\/li>\n
    • Lu\u1ed3ng:<\/strong>C\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra d\u1eef li\u1ec7u ch\u00ednh.<\/li>\n<\/ul>\n

      2. S\u01a1 \u0111\u1ed3 M\u1ee9c 1<\/h3>\n

      S\u01a1 \u0111\u1ed3 M\u1ee9c 1 ph\u00e2n r\u00e3 quy tr\u00ecnh duy nh\u1ea5t t\u1eeb S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh th\u00e0nh c\u00e1c ti\u1ec3u quy tr\u00ecnh ch\u00ednh. \u0110\u00e2y l\u00e0 m\u1ee9c ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. N\u00f3 ti\u1ebft l\u1ed9 c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng. M\u1ed7i ch\u1ee9c n\u0103ng ch\u00ednh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh \u1edf \u0111\u00e2y s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t n\u00fat quy tr\u00ecnh ri\u00eang bi\u1ec7t.<\/p>\n

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      • Ph\u1ea1m vi:<\/strong>C\u00e1c m\u00f4-\u0111un ch\u1ee9c n\u0103ng ch\u00ednh.<\/li>\n
      • T\u01b0\u01a1ng t\u00e1c:<\/strong>D\u1eef li\u1ec7u di chuy\u1ec3n gi\u1eefa c\u00e1c m\u00f4-\u0111un n\u00e0y v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean ngo\u00e0i.<\/li>\n
      • B\u1ed9 nh\u1edb:<\/strong>C\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u00ednh ho\u1eb7c h\u1ec7 th\u1ed1ng t\u1ec7p tin \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u.<\/li>\n<\/ul>\n

        3. M\u1ee9c 2 v\u00e0 th\u1ea5p h\u01a1n<\/h3>\n

        C\u00e1c s\u01a1 \u0111\u1ed3 m\u1ee9c 2 ph\u00e2n t\u00edch chi ti\u1ebft c\u00e1c quy tr\u00ecnh c\u1ee5 th\u1ec3 t\u1eeb s\u01a1 \u0111\u1ed3 m\u1ee9c 1. \u0110i\u1ec1u n\u00e0y d\u00e0nh ri\u00eang cho c\u00e1c quy tr\u00ecnh ph\u1ee9c t\u1ea1p li\u00ean quan \u0111\u1ebfn logic \u0111\u00e1ng k\u1ec3 ho\u1eb7c x\u1eed l\u00fd d\u1eef li\u1ec7u. Vi\u1ec7c ph\u00e2n t\u00edch qu\u00e1 m\u1ee9c \u1edf c\u1ea5p \u0111\u1ed9 n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c s\u01a1 \u0111\u1ed3 qu\u00e1 l\u1edbn \u0111\u1ec3 \u0111\u1ecdc, do \u0111\u00f3 c\u1ea7n th\u1eadn tr\u1ecdng. Th\u00f4ng th\u01b0\u1eddng, ch\u1ec9 nh\u1eefng ch\u1ee9c n\u0103ng ph\u1ee9c t\u1ea1p nh\u1ea5t m\u1edbi x\u1ee9ng \u0111\u00e1ng v\u1edbi \u0111\u1ed9 chi ti\u1ebft n\u00e0y.<\/p>\n

        \u2696\ufe0f Nguy\u00ean t\u1eafc C\u00e2n b\u1eb1ng<\/h2>\n

        M\u1ed9t trong nh\u1eefng quy t\u1eafc quan tr\u1ecdng nh\u1ea5t trong vi\u1ec7c x\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) l\u00e0 nguy\u00ean t\u1eafc c\u00e2n b\u1eb1ng. C\u00e2n b\u1eb1ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra c\u1ee7a m\u1ed9t quy tr\u00ecnh cha kh\u1edbp v\u1edbi c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra c\u1ee7a c\u00e1c quy tr\u00ecnh con c\u1ee7a n\u00f3. N\u1ebfu m\u1ed9t quy tr\u00ecnh cha c\u00f3 lu\u1ed3ng \u0111\u1ea7u v\u00e0o “Y\u00eau c\u1ea7u \u0111\u1eb7t h\u00e0ng”, th\u00ec quy tr\u00ecnh con c\u0169ng ph\u1ea3i ch\u1ea5p nh\u1eadn m\u1ed9t “Y\u00eau c\u1ea7u \u0111\u1eb7t h\u00e0ng” (ho\u1eb7c m\u1ed9t t\u1eadp con logic t\u1ed5ng h\u1ee3p th\u00e0nh n\u00f3).<\/p>\n

        Vi ph\u1ea1m quy t\u1eafc n\u00e0y s\u1ebd t\u1ea1o ra s\u1ef1 m\u00e2u thu\u1eabn. M\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ecdc s\u01a1 \u0111\u1ed3 con c\u00f3 th\u1ec3 th\u1ea5y m\u1ed9t \u0111\u1ea7u v\u00e0o m\u00e0 s\u01a1 \u0111\u1ed3 cha n\u00f3i r\u1eb1ng ch\u01b0a bao gi\u1edd x\u1ea3y ra. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn l\u1ed7i tri\u1ec3n khai. Khi ph\u00e2n t\u00edch m\u1ed9t quy tr\u00ecnh, b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o:<\/p>\n

          \n
        • T\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0o quy tr\u00ecnh cha c\u0169ng ph\u1ea3i v\u00e0o c\u00e1c quy tr\u00ecnh con.<\/li>\n
        • T\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u ra kh\u1ecfi c\u00e1c quy tr\u00ecnh con c\u0169ng ph\u1ea3i ra kh\u1ecfi quy tr\u00ecnh cha.<\/li>\n
        • Kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u th\u00eam lu\u1ed3ng d\u1eef li\u1ec7u m\u1edbi m\u00e0 kh\u00f4ng c\u00f3 l\u00fd do h\u1ee3p l\u00fd trong ph\u1ea1m vi quy tr\u00ecnh cha.<\/li>\n
        • Kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m m\u1ea5t \u0111i b\u1ea5t k\u1ef3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0o hi\u1ec7n c\u00f3 trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch.<\/li>\n<\/ul>\n

          H\u00e3y ngh\u0129 \u0111\u1ebfn c\u00e2n b\u1eb1ng nh\u01b0 m\u1ed9t lu\u1eadt b\u1ea3o to\u00e0n d\u1eef li\u1ec7u. D\u1eef li\u1ec7u kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra hay ti\u00eau h\u1ee7y b\u00ean trong ranh gi\u1edbi h\u1ec7 th\u1ed1ng; n\u00f3 ch\u1ec9 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i. Nguy\u00ean t\u1eafc n\u00e0y bu\u1ed9c ki\u1ebfn tr\u00fac s\u01b0 ph\u1ea3i gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng t\u1eebng ph\u1ea7n d\u1eef li\u1ec7u \u0111i v\u00e0o ho\u1eb7c r\u1eddi kh\u1ecfi h\u1ec7 th\u1ed1ng.<\/p>\n

          \ud83d\udd04 S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) so v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt v\u1ebd s\u01a1 \u0111\u1ed3 kh\u00e1c<\/h2>\n

          S\u1ef1 nh\u1ea7m l\u1eabn th\u01b0\u1eddng x\u1ea3y ra gi\u1eefa DFD, s\u01a1 \u0111\u1ed3 lu\u1ed3ng v\u00e0 s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 (ERD). M\u1eb7c d\u00f9 ch\u00fang \u0111\u1ec1u m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng, nh\u01b0ng m\u1ed7i lo\u1ea1i c\u00f3 m\u1ee5c \u0111\u00edch kh\u00e1c nhau. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 sai cho m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 l\u00e0m m\u1edd \u00fd \u0111\u1ed3 thi\u1ebft k\u1ebf.<\/p>\n\n\n\n\n\n\n\n\n
          Lo\u1ea1i s\u01a1 \u0111\u1ed3<\/th>\nTr\u1ecdng t\u00e2m ch\u00ednh<\/th>\nD\u00f9ng t\u1ed1t nh\u1ea5t cho<\/th>\n<\/tr>\n<\/thead>\n
          S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD)<\/strong><\/td>\nChuy\u1ec3n \u0111\u1ed9ng logic c\u1ee7a d\u1eef li\u1ec7u<\/td>\nPh\u00e2n t\u00edch h\u1ec7 th\u1ed1ng, x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi h\u1ec7 th\u1ed1ng, chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
          S\u01a1 \u0111\u1ed3 lu\u1ed3ng<\/strong><\/td>\nLu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 logic<\/td>\nThi\u1ebft k\u1ebf thu\u1eadt to\u00e1n, c\u00e1c \u0111\u01b0\u1eddng \u0111i ra quy\u1ebft \u0111\u1ecbnh, logic quy tr\u00ecnh c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n
          S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 (ERD)<\/strong><\/td>\nC\u1ea5u tr\u00fac d\u1eef li\u1ec7u v\u00e0 m\u1ed1i quan h\u1ec7<\/td>\nThi\u1ebft k\u1ebf l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u, chu\u1ea9n h\u00f3a l\u01b0u tr\u1eef<\/td>\n<\/tr>\n
          S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1<\/strong><\/td>\nT\u01b0\u01a1ng t\u00e1c theo th\u1eddi gian<\/td>\nG\u1ecdi API, lu\u1ed3ng phi\u00ean ng\u01b0\u1eddi d\u00f9ng, c\u00e1c ph\u1ee5 thu\u1ed9c theo th\u1eddi gian<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n c\u1ea7n x\u00e1c \u0111\u1ecbnh c\u00e1ch x\u00e1c th\u1ef1c m\u1ed9t m\u00e3 th\u00f4ng b\u00e1o x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng, s\u01a1 \u0111\u1ed3 lu\u1ed3ng c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n \u0111\u1ec3 th\u1ec3 hi\u1ec7n logic th\u00e0nh c\u00f4ng\/th\u1ea5t b\u1ea1i. N\u1ebfu b\u1ea1n c\u1ea7n x\u00e1c \u0111\u1ecbnh n\u01a1i m\u00e3 th\u00f4ng b\u00e1o \u0111\u00f3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t, DFD s\u1ebd th\u1ec3 hi\u1ec7n lu\u1ed3ng \u0111\u1ebfn n\u01a1i l\u01b0u tr\u1eef, trong khi ERD s\u1ebd th\u1ec3 hi\u1ec7n l\u01b0\u1ee3c \u0111\u1ed3 c\u1ee7a b\u1ea3ng l\u01b0u tr\u1eef. DFD cung c\u1ea5p b\u1ea3n \u0111\u1ed3 ch\u1ee9c n\u0103ng, trong khi c\u00e1c s\u01a1 \u0111\u1ed3 kh\u00e1c cung c\u1ea5p chi ti\u1ebft c\u1ea5u tr\u00fac v\u00e0 logic.<\/p>\n

          \ud83d\udee0 C\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf v\u00e0 th\u1ef1c h\u00e0nh t\u1ed1t<\/h2>\n

          Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 v\u1ebd c\u00e1c h\u00ecnh h\u1ed9p v\u00e0 m\u0169i t\u00ean. N\u00f3 \u0111\u00f2i h\u1ecfi tu\u00e2n th\u1ee7 c\u00e1c quy \u01b0\u1edbc \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 lu\u00f4n d\u1ec5 \u0111\u1ecdc v\u00e0 ch\u00ednh x\u00e1c theo th\u1eddi gian. Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc n\u00e0y ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng l\u1ec7ch l\u1ea1c t\u00e0i li\u1ec7u, khi s\u01a1 \u0111\u1ed3 kh\u00f4ng c\u00f2n kh\u1edbp v\u1edbi m\u00e3 ngu\u1ed3n.<\/p>\n

          1. Quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean<\/h3>\n

          Nh\u00e3n l\u00e0 v\u0103n b\u1ea3n mang \u00fd ngh\u0129a. M\u1ed9t s\u01a1 \u0111\u1ed3 DFD m\u00e0 kh\u00f4ng c\u00f3 nh\u00e3n r\u00f5 r\u00e0ng l\u00e0 v\u00f4 d\u1ee5ng. M\u1ed7i lu\u1ed3ng d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 c\u1ee5m danh t\u1eeb (v\u00ed d\u1ee5: \u201cM\u00e3 ng\u01b0\u1eddi d\u00f9ng\u201d, \u201cNh\u1eadt k\u00fd giao d\u1ecbch\u201d). M\u1ed7i qu\u00e1 tr\u00ecnh ph\u1ea3i c\u00f3 c\u1ee5m \u0111\u1ed9ng t\u1eeb (v\u00ed d\u1ee5: \u201cX\u00e1c th\u1ef1c m\u1eadt kh\u1ea9u\u201d, \u201cT\u1ea1o h\u00f3a \u0111\u01a1n\u201d). S\u1ef1 ph\u00e2n bi\u1ec7t ng\u1eef ph\u00e1p n\u00e0y gi\u00fap l\u00e0m r\u00f5 h\u00e0nh \u0111\u1ed9ng so v\u1edbi n\u1ed9i dung.<\/p>\n

            \n
          • T\u00ean qu\u00e1 tr\u00ecnh:<\/strong>C\u1ea5u tr\u00fac \u0110\u1ed9ng t\u1eeb-Danh t\u1eeb. Tr\u00e1nh d\u00f9ng c\u00e1c t\u1eeb \u0111\u01a1n nh\u01b0 \u201cQu\u00e1 tr\u00ecnh\u201d ho\u1eb7c \u201cLogic\u201d.<\/li>\n
          • T\u00ean lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong>C\u1ee5m danh t\u1eeb m\u00f4 t\u1ea3 g\u00f3i th\u00f4ng tin.<\/li>\n
          • T\u00ean kho d\u1eef li\u1ec7u:<\/strong>C\u1ee5m danh t\u1eeb, s\u1ed1 \u00edt ho\u1eb7c s\u1ed1 nhi\u1ec1u, ch\u1ec9 ra t\u1eadp h\u1ee3p d\u1eef li\u1ec7u (v\u00ed d\u1ee5: \u201cDanh s\u00e1ch kh\u00e1ch h\u00e0ng\u201d).<\/li>\n<\/ul>\n

            2. Tr\u00e1nh logic \u0111i\u1ec1u khi\u1ec3n<\/h3>\n

            M\u1ed9t sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 \u0111\u01b0a logic \u0111i\u1ec1u khi\u1ec3n v\u00e0o s\u01a1 \u0111\u1ed3 DFD. S\u01a1 \u0111\u1ed3 DFD m\u00f4 t\u1ea3 s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh. B\u1ea1n kh\u00f4ng n\u00ean v\u1ebd h\u00ecnh thoi \u0111\u1ec3 ch\u1ec9 nh\u00e1nh \u201cC\u00f3\/Kh\u00f4ng\u201d. N\u1ebfu c\u00f3 quy\u1ebft \u0111\u1ecbnh, th\u00ec \u0111\u00f3 l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u1ecdc d\u1eef li\u1ec7u. Lu\u1ed3ng ph\u1ea3i th\u1ec3 hi\u1ec7n d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0o qu\u00e1 tr\u00ecnh v\u00e0 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 \u0111\u1ea7u ra. V\u00ed d\u1ee5, thay v\u00ec nh\u00e1nh, h\u00e3y hi\u1ec3n th\u1ecb hai lu\u1ed3ng: \u201c\u0110\u01a1n h\u00e0ng \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn\u201d v\u00e0 \u201c\u0110\u01a1n h\u00e0ng b\u1ecb t\u1eeb ch\u1ed1i\u201d xu\u1ea5t ph\u00e1t t\u1eeb n\u00fat \u201cX\u1eed l\u00fd \u0111\u01a1n h\u00e0ng\u201d.<\/p>\n

            3. Qu\u1ea3n l\u00fd c\u00e1c h\u1ed1 \u0111en v\u00e0 ph\u00e9p m\u00e0u<\/h3>\n

            Trong ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng, c\u1ea7n tr\u00e1nh m\u1ed9t s\u1ed1 hi\u1ec7n t\u01b0\u1ee3ng b\u1ea5t th\u01b0\u1eddng:<\/p>\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 b\u1ecb ti\u00eau th\u1ee5 v\u00e0 bi\u1ebfn m\u1ea5t m\u00e0 kh\u00f4ng t\u1ea1o ra k\u1ebft qu\u1ea3 n\u00e0o.<\/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 kh\u00f4ng c\u00f3 g\u00ec.<\/li>\n
            • Ma qu\u00e1i:<\/strong>M\u1ed9t kho d\u1eef li\u1ec7u kh\u00f4ng c\u00f3 lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0o k\u1ebft n\u1ed1i v\u1edbi n\u00f3. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y v\u1ecb tr\u00ed l\u01b0u tr\u1eef n\u00e0y ch\u01b0a bao gi\u1edd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/li>\n<\/ul>\n

              Vi\u1ec7c ph\u00e1t hi\u1ec7n nh\u1eefng b\u1ea5t th\u01b0\u1eddng n\u00e0y trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf s\u1ebd ti\u1ebft ki\u1ec7m r\u1ea5t nhi\u1ec1u th\u1eddi gian g\u1ee1 l\u1ed7i sau n\u00e0y. N\u1ebfu m\u1ed9t qu\u00e1 tr\u00ecnh kh\u00f4ng c\u00f3 \u0111\u1ea7u ra, h\u1ec7 th\u1ed1ng kh\u00f4ng t\u1ea1o ra gi\u00e1 tr\u1ecb cho \u0111\u1ea7u v\u00e0o \u0111\u00f3. N\u1ebfu m\u1ed9t kho kh\u00f4ng c\u00f3 \u0111\u1ea7u v\u00e0o, n\u00f3 s\u1ebd tr\u1ed1ng r\u1ed7ng v\u00e0 v\u00f4 ngh\u0129a.<\/p>\n

              \ud83d\udd17 T\u1eeb s\u01a1 \u0111\u1ed3 \u0111\u1ebfn m\u00e3 ngu\u1ed3n: Chi\u1ebfn l\u01b0\u1ee3c tri\u1ec3n khai<\/h2>\n

              Khi s\u01a1 \u0111\u1ed3 DFD \u0111\u01b0\u1ee3c ho\u00e0n thi\u1ec7n, n\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng cho \u0111\u1ed9i ph\u00e1t tri\u1ec3n. Chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh tr\u1ef1c quan n\u00e0y th\u00e0nh m\u00e3 ngu\u1ed3n th\u1ef1c thi \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 h\u1ec7 th\u1ed1ng. S\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1ecbnh h\u01b0\u1edbng ki\u1ebfn tr\u00fac, l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c \u0111i\u1ec3m cu\u1ed1i API.<\/p>\n

              1. X\u00e1c \u0111\u1ecbnh d\u1ecbch v\u1ee5 v\u00e0 module<\/h3>\n

              M\u1ed7i qu\u00e1 tr\u00ecnh trong s\u01a1 \u0111\u1ed3 c\u1ea5p 1 th\u01b0\u1eddng t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t microservice, m\u1ed9t module ho\u1eb7c m\u1ed9t l\u1edbp. V\u00ed d\u1ee5, m\u1ed9t qu\u00e1 tr\u00ecnh t\u00ean l\u00e0 \u201cT\u00ednh thu\u1ebf\u201d c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t h\u00e0m chuy\u00ean bi\u1ec7t trong module thanh to\u00e1n. M\u1ed9t qu\u00e1 tr\u00ecnh t\u00ean l\u00e0 \u201cQu\u1ea3n l\u00fd h\u1ed3 s\u01a1 ng\u01b0\u1eddi d\u00f9ng\u201d c\u00f3 th\u1ec3 \u00e1nh x\u1ea1 th\u00e0nh D\u1ecbch v\u1ee5 Ng\u01b0\u1eddi d\u00f9ng. Vi\u1ec7c \u00e1nh x\u1ea1 n\u00e0y \u0111\u1ea3m b\u1ea3o c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n ph\u1ea3n \u00e1nh \u0111\u00fang logic kinh doanh.<\/p>\n

              2. X\u00e1c \u0111\u1ecbnh h\u1ee3p \u0111\u1ed3ng API<\/h3>\n

              C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh th\u01b0\u1eddng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i API. N\u1ebfu m\u1ed9t th\u1ef1c th\u1ec3 g\u1eedi \u201cD\u1eef li\u1ec7u \u0111\u0103ng k\u00fd\u201d \u0111\u1ebfn m\u1ed9t qu\u00e1 tr\u00ecnh, \u0111i\u1ec3m cu\u1ed1i API t\u01b0\u01a1ng \u1ee9ng ph\u1ea3i ch\u1ea5p nh\u1eadn d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac t\u01b0\u01a1ng \u1ee9ng. S\u01a1 \u0111\u1ed3 DFD x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3c \u0111\u1ed3 \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra cho c\u00e1c \u0111i\u1ec3m cu\u1ed1i n\u00e0y. \u0110i\u1ec1u n\u00e0y gi\u1ea3m nhu c\u1ea7u \u0111\u00e0m ph\u00e1n l\u1eb7p l\u1ea1i gi\u1eefa c\u00e1c \u0111\u1ed9i frontend v\u00e0 backend.<\/p>\n

              3. Thi\u1ebft k\u1ebf l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/h3>\n

              C\u00e1c kho d\u1eef li\u1ec7u trong s\u01a1 \u0111\u1ed3 DFD \u0111\u1ea1i di\u1ec7n cho l\u1edbp l\u01b0u tr\u1eef. M\u1eb7c d\u00f9 s\u01a1 \u0111\u1ed3 DFD kh\u00f4ng hi\u1ec3n th\u1ecb c\u00e1c tr\u01b0\u1eddng hay kh\u00f3a, nh\u01b0ng n\u00f3 x\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u n\u00e0o c\u1ea7n \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. \u201cL\u1ecbch s\u1eed \u0111\u01a1n h\u00e0ng\u201d ng\u1ee5 \u00fd m\u1ed9t b\u1ea3ng ho\u1eb7c b\u1ed9 s\u01b0u t\u1eadp cho c\u00e1c \u0111\u01a1n h\u00e0ng. \u201cPhi\u00ean l\u00e0m vi\u1ec7c \u0111ang ho\u1ea1t \u0111\u1ed9ng\u201d ng\u1ee5 \u00fd m\u1ed9t kho l\u01b0u tr\u1eef tr\u1ea1ng th\u00e1i ng\u01b0\u1eddi d\u00f9ng. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 DFD \u0111\u1ec3 \u01b0u ti\u00ean c\u00e1c b\u1ea3ng quan tr\u1ecdng v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c kho d\u1eef li\u1ec7u ph\u00f9 h\u1ee3p v\u1edbi lu\u1ed3ng th\u00f4ng tin.<\/p>\n

              4. X\u00e1c th\u1ef1c v\u00e0 ki\u1ec3m th\u1eed<\/h3>\n

              C\u00e1c tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c suy ra tr\u1ef1c ti\u1ebfp t\u1eeb lu\u1ed3ng d\u1eef li\u1ec7u. M\u1ed7i m\u0169i t\u00ean \u0111\u1ea1i di\u1ec7n cho m\u1ed9t \u0111\u01b0\u1eddng ki\u1ec3m th\u1eed ti\u1ec1m n\u0103ng. \u201cN\u1ebfu t\u00f4i g\u1eedi m\u1ed9t \u0110\u01a1n h\u00e0ng, h\u1ec7 th\u1ed1ng c\u00f3 tr\u1ea3 v\u1ec1 H\u00f3a \u0111\u01a1n kh\u00f4ng?\u201d T\u00ednh kh\u1ea3 thi theo d\u00f5i n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed7i d\u00f2ng m\u00e3 \u0111\u1ec1u ph\u1ee5c v\u1ee5 m\u1ed9t m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong thi\u1ebft k\u1ebf ban \u0111\u1ea7u. N\u00f3 ng\u0103n ch\u1eb7n hi\u1ec7n t\u01b0\u1ee3ng \u201cm\u1edf r\u1ed9ng t\u00ednh n\u0103ng\u201d khi th\u00eam m\u00e3 m\u00e0 kh\u00f4ng xu\u1ea5t hi\u1ec7n trong lu\u1ed3ng d\u1eef li\u1ec7u.<\/p>\n

              \ud83d\udee1 Chu k\u1ef3 b\u1ea3o tr\u00ec v\u00e0 t\u00e0i li\u1ec7u h\u00f3a<\/h2>\n

              M\u1ed9t s\u01a1 \u0111\u1ed3 ch\u1ec9 t\u1ed1t b\u1eb1ng m\u1ee9c \u0111\u1ed9 c\u1eadp nh\u1eadt c\u1ee7a n\u00f3. M\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) kh\u00f4ng ph\u1ea3n \u00e1nh h\u1ec7 th\u1ed1ng hi\u1ec7n t\u1ea1i tr\u1edf th\u00e0nh n\u1ee3 k\u1ef9 thu\u1eadt. N\u00f3 g\u00e2y hi\u1ec3u l\u1ea7m cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi v\u00e0 l\u00e0m m\u1edd \u0111i logic th\u1ef1c t\u1ebf. Do \u0111\u00f3, b\u1ea3o tr\u00ec l\u00e0 m\u1ed9t ph\u1ea7n trong chu k\u1ef3 ph\u00e1t tri\u1ec3n.<\/p>\n

                \n
              • Phi\u00ean b\u1ea3n:<\/strong>Xem s\u01a1 \u0111\u1ed3 DFD nh\u01b0 m\u00e3 ngu\u1ed3n. Khi h\u1ec7 th\u1ed1ng thay \u0111\u1ed5i, s\u01a1 \u0111\u1ed3 ph\u1ea3i \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt. \u0110\u00e1nh d\u1ea5u phi\u00ean b\u1ea3n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c b\u1ea3n ph\u00e1t h\u00e0nh ph\u1ea7n m\u1ec1m.<\/li>\n
              • V\u00f2ng ki\u1ec3m tra:<\/strong>Bao g\u1ed3m vi\u1ec7c c\u1eadp nh\u1eadt DFD trong quy tr\u00ecnh ki\u1ec3m tra m\u00e3 ngu\u1ed3n. N\u1ebfu m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n th\u00eam m\u1ed9t lu\u1ed3ng d\u1eef li\u1ec7u m\u1edbi, h\u1ecd ph\u1ea3i c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3.<\/li>\n
              • Kh\u1ea3 n\u0103ng truy c\u1eadp:<\/strong>Gi\u1eef c\u00e1c s\u01a1 \u0111\u1ed3 trong c\u00f9ng m\u1ed9t kho l\u01b0u tr\u1eef ho\u1eb7c h\u1ec7 th\u1ed1ng t\u00e0i li\u1ec7u nh\u01b0 m\u00e3 ngu\u1ed3n. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o ch\u00fang kh\u00f4ng b\u1ecb m\u1ea5t khi nh\u00f3m chuy\u1ec3n \u0111\u1ed5i c\u00f4ng c\u1ee5.<\/li>\n
              • \u0110\u01a1n gi\u1ea3n h\u00f3a:<\/strong>N\u1ebfu m\u1ed9t s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean qu\u00e1 ph\u1ee9c t\u1ea1p, h\u00e3y c\u00e2n nh\u1eafc chia nh\u1ecf n\u00f3. M\u1ed9t trang duy nh\u1ea5t ch\u1ee9a 50 qu\u00e1 tr\u00ecnh l\u00e0 r\u1ea5t kh\u00f3 \u0111\u1ecdc. C\u00e1c s\u01a1 \u0111\u1ed3 theo m\u00f4-\u0111un d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/li>\n<\/ul>\n

                Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 s\u01a1 \u0111\u1ed3 so v\u1edbi c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n s\u1ebd ph\u00e1t hi\u1ec7n ra nh\u1eefng b\u1ea5t nh\u1ea5t. C\u00f3 c\u00e1c kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u trong m\u00e3 ngu\u1ed3n nh\u01b0ng kh\u00f4ng c\u00f3 trong s\u01a1 \u0111\u1ed3 kh\u00f4ng? C\u00f3 c\u00e1c qu\u00e1 tr\u00ecnh trong s\u01a1 \u0111\u1ed3 \u0111\u00e3 b\u1ecb tinh ch\u1ec9nh \u0111i kh\u00f4ng? Vi\u1ec7c x\u1eed l\u00fd nh\u1eefng kho\u1ea3ng tr\u1ed1ng n\u00e0y gi\u00fap duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00e0i li\u1ec7u h\u1ec7 th\u1ed1ng.<\/p>\n

                \ud83c\udf1f T\u00f3m t\u1eaft l\u1ee3i \u00edch<\/h2>\n

                Th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 k\u1ef7 lu\u1eadt \u0111\u1ed1i v\u1edbi s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u mang l\u1ea1i k\u1ebft qu\u1ea3 r\u00f5 r\u1ec7t. N\u00f3 bu\u1ed9c \u0111\u1ed9i ng\u0169 ph\u1ea3i suy ngh\u0129 v\u1ec1 d\u1eef li\u1ec7u tr\u01b0\u1edbc khi ngh\u0129 \u0111\u1ebfn logic. N\u00f3 cung c\u1ea5p m\u1ed9t ng\u00f4n ng\u1eef chung cho c\u00e1c b\u00ean li\u00ean quan c\u00f3 th\u1ec3 kh\u00f4ng hi\u1ec3u m\u00e3 ngu\u1ed3n nh\u01b0ng hi\u1ec3u \u0111\u01b0\u1ee3c quy tr\u00ecnh kinh doanh. N\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u1ea7u n\u1ed1i giao ti\u1ebfp gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch, ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n

                B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc c\u00e2n b\u1eb1ng, tr\u00e1nh logic \u0111i\u1ec1u khi\u1ec3n v\u00e0 duy tr\u00ec th\u1ee9 b\u1eadc c\u1ea5p \u0111\u1ed9, c\u00e1c \u0111\u1ed9i ng\u0169 c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 v\u1eeba ch\u00ednh x\u00e1c v\u1eeba h\u1eefu \u00edch. Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u00fd t\u01b0\u1edfng sang m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean tr\u01a1n tru h\u01a1n v\u00ec \u0111\u00edch \u0111\u1ebfn \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng. C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c, vi\u1ec7c l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c bi\u1ec7n minh, v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c b\u00ean ngo\u00e0i \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a. \u0110i\u1ec1u n\u00e0y gi\u1ea3m thi\u1ec3u c\u00f4ng vi\u1ec7c ph\u1ea3i l\u00e0m l\u1ea1i, t\u1ed1i thi\u1ec3u h\u00f3a s\u1ef1 m\u01a1 h\u1ed3 v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1eefng ch\u1eafc.<\/p>\n

                B\u1eaft \u0111\u1ea7u b\u1eb1ng s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh. Ph\u00e2n t\u00edch m\u1ed9t c\u00e1ch c\u1ea9n tr\u1ecdng. C\u00e2n b\u1eb1ng c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n. Gi\u1eef nh\u00e3n ch\u00ednh x\u00e1c. V\u00e0 h\u00e3y nh\u1edb r\u1eb1ng s\u01a1 \u0111\u1ed3 l\u00e0 m\u1ed9t t\u00e1c ph\u1ea9m s\u1ed1ng \u0111\u1ed9ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m duy nh\u1ea5t. V\u1edbi nh\u1eefng th\u1ef1c h\u00e0nh n\u00e0y, \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i tr\u1edf n\u00ean ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c, v\u00e0 con \u0111\u01b0\u1eddng t\u1eeb \u00fd t\u01b0\u1edfng \u0111\u1ebfn tri\u1ec3n khai v\u1eabn lu\u00f4n r\u00f5 r\u00e0ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

                Trong ki\u1ebfn tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p, s\u1ef1 r\u00f5 r\u00e0ng l\u00e0 \u0111\u1ed3ng ti\u1ec1n c\u1ee7a th\u00e0nh c\u00f4ng. Tr\u01b0\u1edbc khi vi\u1ebft b\u1ea5t k\u1ef3 d\u00f2ng logic n\u00e0o, vi\u1ec7c di…<\/p>\n","protected":false},"author":1,"featured_media":1799,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn S\u01a1 \u0111\u1ed3 Lu\u1ed3ng D\u1eef li\u1ec7u: T\u1eeb \u00fd t\u01b0\u1edfng \u0111\u1ebfn m\u00e3 ngu\u1ed3n \ud83d\udcca","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch x\u00e2y d\u1ef1ng c\u00e1c s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) hi\u1ec7u qu\u1ea3. T\u1eeb c\u1ea5p \u0111\u1ed9 0 \u0111\u1ebfn tri\u1ec3n khai. 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