{"id":1823,"date":"2026-03-26T11:49:56","date_gmt":"2026-03-26T11:49:56","guid":{"rendered":"https:\/\/www.tech-posts.com\/vi\/avoiding-common-data-flow-diagram-mistakes-enterprise-projects\/"},"modified":"2026-03-26T11:49:56","modified_gmt":"2026-03-26T11:49:56","slug":"avoiding-common-data-flow-diagram-mistakes-enterprise-projects","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/vi\/avoiding-common-data-flow-diagram-mistakes-enterprise-projects\/","title":{"rendered":"Tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u trong c\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p"},"content":{"rendered":"

Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p ph\u1ee9c t\u1ea1p, ki\u1ebfn tr\u00fac th\u00f4ng tin quan tr\u1ecdng kh\u00f4ng k\u00e9m g\u00ec m\u00e3 ngu\u1ed3n x\u1eed l\u00fd n\u00f3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) \u0111\u00f3ng vai tr\u00f2 l\u00e0 b\u1ea3n v\u1ebd n\u1ec1n t\u1ea3ng \u0111\u1ec3 hi\u1ec3u c\u00e1ch th\u00f4ng tin di chuy\u1ec3n qua h\u1ec7 th\u1ed1ng. Ch\u00fang m\u00f4 t\u1ea3 lu\u1ed3ng d\u1eef li\u1ec7u t\u1eeb c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, qua c\u00e1c qu\u00e1 tr\u00ecnh, v\u00e0o c\u00e1c kho d\u1eef li\u1ec7u v\u00e0 quay l\u1ea1i. Tuy nhi\u00ean, vi\u1ec7c t\u1ea1o ra m\u1ed9t DFD ph\u1ea3n \u00e1nh \u0111\u00fang th\u1ef1c t\u1ebf m\u00e0 kh\u00f4ng g\u00e2y nh\u1ea7m l\u1eabn hay n\u1ee3 k\u1ef9 thu\u1eadt \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c. Nhi\u1ec1u t\u1ed5 ch\u1ee9c g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 tr\u00f4ng \u0111\u00fang v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c nh\u01b0ng th\u1ea5t b\u1ea1i v\u1ec1 m\u1eb7t logic trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai.<\/p>\n

Khi m\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u1ee9a nh\u1eefng sai s\u00f3t c\u01a1 b\u1ea3n, h\u1ec7 qu\u1ea3 s\u1ebd lan r\u1ed9ng qua to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n. Nh\u1eefng lu\u1ed3ng d\u1eef li\u1ec7u b\u1ecb hi\u1ec3u nh\u1ea7m d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt, c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u k\u00e9m hi\u1ec7u qu\u1ea3 v\u00e0 th\u1ea5t b\u1ea1i t\u00edch h\u1ee3p. H\u01b0\u1edbng d\u1eabn n\u00e0y ph\u00e2n t\u00edch nh\u1eefng \u0111i\u1ec3m nguy hi\u1ec3m c\u1ee5 th\u1ec3 khi\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a DFD b\u1ecb sai l\u1ec7ch trong c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn v\u00e0 cung c\u1ea5p c\u00e1c chi\u1ebfn l\u01b0\u1ee3c th\u1ef1c t\u1ebf \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n m\u00f4 h\u00ecnh h\u00f3a nghi\u00eam ng\u1eb7t, c\u00e1c \u0111\u1ed9i ng\u0169 c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u ki\u1ebfn tr\u00fac c\u1ee7a h\u1ecd lu\u00f4n l\u00e0 ngu\u1ed3n th\u00f4ng tin \u0111\u00e1ng tin c\u1eady.<\/p>\n

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

Hi\u1ec3u r\u00f5 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a m\u1ed9t DFD \ud83e\uddf1<\/h2>\n

Tr\u01b0\u1edbc khi ph\u00e1t hi\u1ec7n sai l\u1ea7m, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 x\u00e1c \u0111\u1ecbnh nh\u1eefng g\u00ec t\u1ea1o n\u00ean m\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u h\u1ee3p l\u1ec7. DFD l\u00e0 bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u. N\u00f3 kh\u00f4ng th\u1ec3 hi\u1ec7n lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n, th\u1ee9 t\u1ef1 th\u1eddi gian hay v\u00f2ng l\u1eb7p theo ngh\u0129a truy\u1ec1n th\u1ed1ng c\u1ee7a logic l\u1eadp tr\u00ecnh. Thay v\u00e0o \u0111\u00f3, n\u00f3 t\u1eadp trung v\u00e0o s\u1ef1 di chuy\u1ec3n v\u00e0 bi\u1ebfn \u0111\u1ed5i c\u1ee7a d\u1eef li\u1ec7u. M\u1ed7i s\u01a1 \u0111\u1ed3 \u0111\u1ec1u d\u1ef1a tr\u00ean b\u1ed1n k\u00fd hi\u1ec7u ch\u00ednh, v\u00e0 s\u1ef1 l\u1ec7ch l\u1ea1c \u1edf \u0111\u00e2y th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n

    \n
  • C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:<\/strong> Ch\u00fang \u0111\u1ea1i di\u1ec7n cho ngu\u1ed3n ho\u1eb7c \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u b\u00ean ngo\u00e0i ranh gi\u1edbi h\u1ec7 th\u1ed1ng. Th\u01b0\u1eddng l\u00e0 con ng\u01b0\u1eddi, t\u1ed5 ch\u1ee9c ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c. Ch\u00fang kh\u1edfi t\u1ea1o ho\u1eb7c nh\u1eadn d\u1eef li\u1ec7u nh\u01b0ng kh\u00f4ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111\u00f3 trong ng\u1eef c\u1ea3nh h\u1ec7 th\u1ed1ng hi\u1ec7n t\u1ea1i.<\/li>\n
  • C\u00e1c qu\u00e1 tr\u00ecnh:<\/strong> Ch\u00fang l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng bi\u1ebfn \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o th\u00e0nh d\u1eef li\u1ec7u \u0111\u1ea7u ra. Ch\u00fang ph\u1ea3i mang t\u00ednh ch\u1ee9c n\u0103ng; kh\u00f4ng th\u1ec3 ch\u1ec9 truy\u1ec1n d\u1eef li\u1ec7u qua m\u00e0 kh\u00f4ng thay \u0111\u1ed5i, tr\u1eeb khi \u0111ang m\u00f4 h\u00ecnh h\u00f3a m\u1ed9t thao t\u00e1c truy\u1ec1n qua r\u00f5 r\u00e0ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 \u0111\u1ec3 th\u1ec3 hi\u1ec7n th\u1ee9 b\u1eadc.<\/li>\n
  • C\u00e1c kho d\u1eef li\u1ec7u:<\/strong> Ch\u00fang \u0111\u1ea1i di\u1ec7n cho c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c gi\u1eef \u0111\u1ec3 s\u1eed d\u1ee5ng sau n\u00e0y. Kh\u00e1c v\u1edbi c\u00e1c qu\u00e1 tr\u00ecnh, ch\u00fang kh\u00f4ng thay \u0111\u1ed5i d\u1eef li\u1ec7u. Ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00e1c qu\u00e1 tr\u00ecnh th\u00f4ng qua c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n
  • C\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong> Ch\u00fang l\u00e0 c\u00e1c m\u0169i t\u00ean k\u1ebft n\u1ed1i c\u00e1c th\u00e0nh ph\u1ea7n. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho s\u1ef1 di chuy\u1ec3n c\u1ee7a d\u1eef li\u1ec7u. M\u1ed7i lu\u1ed3ng ph\u1ea3i c\u00f3 t\u00ean c\u00f3 \u00fd ngh\u0129a m\u00f4 t\u1ea3 n\u1ed9i dung \u0111ang \u0111\u01b0\u1ee3c di chuy\u1ec3n.<\/li>\n<\/ul>\n

    Khi c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y b\u1ecb hi\u1ec3u sai, s\u01a1 \u0111\u1ed3 s\u1ebd tr\u1edf n\u00ean m\u01a1 h\u1ed3. V\u00ed d\u1ee5, k\u1ebft n\u1ed1i hai th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i tr\u1ef1c ti\u1ebfp m\u00e0 kh\u00f4ng c\u00f3 qu\u00e1 tr\u00ecnh n\u00e0o ng\u1ee5 \u00fd r\u1eb1ng d\u1eef li\u1ec7u \u0111\u00e3 b\u1ecf qua logic h\u1ec7 th\u1ed1ng, \u0111i\u1ec1u n\u00e0y hi\u1ebfm khi x\u1ea3y ra trong ki\u1ebfn tr\u00fac doanh nghi\u1ec7p an to\u00e0n. Hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1ecbnh ngh\u0129a n\u00e0y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a kh\u00f4ng c\u00f3 l\u1ed7i.<\/p>\n

    Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t trong s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u trong b\u1ed1i c\u1ea3nh doanh nghi\u1ec7p \ud83d\udea8<\/h2>\n

    C\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p mang \u0111\u1ebfn nhi\u1ec1u l\u1edbp ph\u1ee9c t\u1ea1p m\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng quy m\u00f4 nh\u1ecf kh\u00f4ng ph\u1ea3i \u0111\u1ed1i m\u1eb7t. Nhi\u1ec1u h\u1ec7 th\u1ed1ng, t\u00edch h\u1ee3p c\u0169 v\u00e0 c\u00e1c quy \u0111\u1ecbnh b\u1ea3o m\u1eadt nghi\u00eam ng\u1eb7t c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng \u1ea9n ch\u1ee9a nh\u1eefng r\u1ee7i ro l\u1edbn. C\u00e1c ph\u1ea7n sau s\u1ebd chi ti\u1ebft h\u00f3a nh\u1eefng sai l\u1ea7m m\u00f4 h\u00ecnh h\u00f3a ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 h\u1ec7 qu\u1ea3 c\u1ee7a ch\u00fang.<\/p>\n

    1. V\u1ea5n \u0111\u1ec1 qu\u00e1 tr\u00ecnh h\u1ed9p \u0111en \ud83c\udf11<\/h3>\n

    M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn x\u1ea3y ra khi m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u01b0\u1ee3c g\u00e1n nh\u00e3n chung chung, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cX\u1eed l\u00fd d\u1eef li\u1ec7u\u201d ho\u1eb7c \u201cX\u1eed l\u00fd y\u00eau c\u1ea7u\u201d, m\u00e0 kh\u00f4ng \u0111\u1ecbnh ngh\u0129a logic b\u00ean trong. Trong khi c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p cao (b\u1ed1i c\u1ea3nh ho\u1eb7c c\u1ea5p \u0111\u1ed9 0) t\u1ef1 nhi\u00ean t\u00f3m t\u1eaft c\u00e1c qu\u00e1 tr\u00ecnh, c\u00e1c s\u01a1 \u0111\u1ed3 c\u1ea5p th\u1ea5p h\u01a1n (c\u1ea5p \u0111\u1ed9 1 tr\u1edf xu\u1ed1ng) l\u1ea1i y\u00eau c\u1ea7u ph\u00e2n r\u00e3. N\u1ebfu m\u1ed9t qu\u00e1 tr\u00ecnh l\u00e0 m\u1ed9t \u201ch\u1ed9p \u0111en\u201d, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c vi\u1ec7c x\u00e1c th\u1ef1c, bi\u1ebfn \u0111\u1ed5i hay l\u1ecdc d\u1eef li\u1ec7u di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n

    Sai l\u1ea7m n\u00e0y d\u1eabn \u0111\u1ebfn:<\/p>\n

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    • Y\u00eau c\u1ea7u kh\u00f4ng r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n.<\/li>\n
    • Kh\u00f3 kh\u0103n trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh n\u01a1i l\u01b0u tr\u1eef logic kinh doanh.<\/li>\n
    • Kho\u1ea3ng tr\u1ed1ng b\u1ea3o m\u1eadt n\u01a1i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1ecb l\u1ed9 ho\u1eb7c x\u1eed l\u00fd sai.<\/li>\n<\/ul>\n

      \u0110\u1ec3 tr\u00e1nh \u0111i\u1ec1u n\u00e0y, h\u00e3y \u0111\u1ea3m b\u1ea3o m\u1ecdi qu\u00e1 tr\u00ecnh \u1edf c\u1ea5p \u0111\u1ed9 1 tr\u1edf xu\u1ed1ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t h\u00e0nh \u0111\u1ed9ng ri\u00eang bi\u1ec7t, nguy\u00ean t\u1eed. N\u1ebfu m\u1ed9t qu\u00e1 tr\u00ecnh qu\u00e1 l\u1edbn, h\u00e3y ph\u00e2n r\u00e3 n\u00f3 th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con cho \u0111\u1ebfn khi logic tr\u1edf n\u00ean minh b\u1ea1ch.<\/p>\n

      2. Kho d\u1eef li\u1ec7u kh\u00f4ng c\u00f3 lu\u1ed3ng d\u1eef li\u1ec7u \ud83d\udce6<\/h3>\n

      T\u1ea1o k\u00fd hi\u1ec7u kho d\u1eef li\u1ec7u trong s\u01a1 \u0111\u1ed3 nh\u01b0ng kh\u00f4ng k\u1ebft n\u1ed1i n\u00f3 v\u1edbi b\u1ea5t k\u1ef3 qu\u00e1 tr\u00ecnh n\u00e0o l\u00e0 m\u1ed9t l\u1ed7i nghi\u00eam tr\u1ecdng. M\u1ed9t kho d\u1eef li\u1ec7u kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o l\u00e0 v\u00f4 d\u1ee5ng. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t kho d\u1eef li\u1ec7u kh\u00f4ng c\u00f3 lu\u1ed3ng \u0111\u1ea7u ra ng\u1ee5 \u00fd d\u1eef li\u1ec7u b\u1ecb m\u1eafc k\u1eb9t b\u00ean trong h\u1ec7 th\u1ed1ng, ch\u01b0a bao gi\u1edd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng hay b\u00e1o c\u00e1o.<\/p>\n

      \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng x\u1ea3y ra khi c\u00e1c \u0111\u1ed9i ng\u0169 m\u00f4 h\u00ecnh h\u00f3a s\u01a1 \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u01b0\u1edbc, r\u1ed3i c\u1ed1 g\u1eafng \u0111i\u1ec1u ch\u1ec9nh DFD xung quanh n\u00f3. C\u00e1ch ti\u1ebfp c\u1eadn \u0111\u00fang l\u00e0 v\u1ebd lu\u1ed3ng d\u1eef li\u1ec7u tr\u01b0\u1edbc. N\u1ebfu m\u1ed9t b\u1ea3ng t\u1ed3n t\u1ea1i trong c\u01a1 s\u1edf d\u1eef li\u1ec7u nh\u01b0ng kh\u00f4ng c\u00f3 quy tr\u00ecnh kinh doanh n\u00e0o \u0111\u1ecdc ho\u1eb7c ghi v\u00e0o n\u00f3, th\u00ec c\u1ea7n \u0111\u1eb7t c\u00e2u h\u1ecfi. C\u00f3 ph\u1ea3i \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3ng b\u1ecb b\u1ecf r\u01a1i? C\u00f3 ph\u1ea3i \u0111\u00e2y l\u00e0 b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ea7n \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a theo c\u00e1ch kh\u00e1c?<\/p>\n

      3. Lu\u1ed3ng ma v\u00e0 d\u1eef li\u1ec7u \u1ea3o \ud83d\udc7b<\/h3>\n

      M\u1ed9t \u2018lu\u1ed3ng ma\u2019 x\u1ea3y ra khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb di chuy\u1ec3n gi\u1eefa hai \u0111i\u1ec3m nh\u01b0ng th\u1ef1c t\u1ebf ch\u01b0a bao gi\u1edd \u0111\u01b0\u1ee3c t\u1ea1o ra hay l\u01b0u tr\u1eef. V\u00ed d\u1ee5, m\u1ed9t lu\u1ed3ng c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb \u2018M\u00e3 kh\u00e1ch h\u00e0ng\u2019 di chuy\u1ec3n t\u1eeb m\u1ed9t Th\u1ef1c th\u1ec3 sang m\u1ed9t Qu\u00e1 tr\u00ecnh, nh\u01b0ng Th\u1ef1c th\u1ec3 \u0111\u00f3 kh\u00f4ng cung c\u1ea5p m\u00e3 ID \u0111\u00f3, v\u00e0 Qu\u00e1 tr\u00ecnh c\u0169ng kh\u00f4ng t\u1ea1o ra n\u00f3. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u00e2u thu\u1eabn trong logic.<\/p>\n

      T\u01b0\u01a1ng t\u1ef1, \u2018d\u1eef li\u1ec7u \u1ea3o\u2019 x\u1ea3y ra khi m\u1ed9t qu\u00e1 tr\u00ecnh xu\u1ea5t ra d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng t\u1ed3n t\u1ea1i \u1edf \u0111\u00e2u trong h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb vi\u1ec7c sao ch\u00e9p s\u01a1 \u0111\u1ed3 t\u1eeb c\u00e1c d\u1ef1 \u00e1n c\u0169 h\u01a1n, n\u01a1i ng\u1eef c\u1ea3nh d\u1eef li\u1ec7u kh\u00e1c bi\u1ec7t. M\u1ed7i lu\u1ed3ng d\u1eef li\u1ec7u ph\u1ea3i c\u00f3 th\u1ec3 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c v\u00e0 \u0111\u00edch \u0111\u1ebfn.<\/p>\n

      4. K\u1ebft n\u1ed1i c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i tr\u1ef1c ti\u1ebfp \u26d3\ufe0f<\/h3>\n

      Trong m\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u h\u1ee3p l\u1ec7, d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u1ec3 v\u00e0o ho\u1eb7c r\u1eddi kh\u1ecfi ranh gi\u1edbi h\u1ec7 th\u1ed1ng. Vi\u1ec7c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp hai th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i ng\u1ee5 \u00fd r\u1eb1ng d\u1eef li\u1ec7u ho\u00e0n to\u00e0n b\u1ecf qua h\u1ec7 th\u1ed1ng. M\u1eb7c d\u00f9 \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra trong m\u1ea1ng th\u1ef1c t\u1ebf (v\u00ed d\u1ee5: API sang API), nh\u01b0ng trong b\u1ed1i c\u1ea3nh m\u00f4 h\u00ecnh h\u00f3a h\u1ec7 th\u1ed1ng, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y h\u1ec7 th\u1ed1ng kh\u00f4ng x\u1eed l\u00fd t\u01b0\u01a1ng t\u00e1c \u0111\u00f3.<\/p>\n

      N\u1ebfu hai h\u1ec7 th\u1ed1ng trao \u0111\u1ed5i d\u1eef li\u1ec7u, ph\u1ea3i c\u00f3 m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u1ea1i di\u1ec7n cho giao di\u1ec7n, c\u1ed5ng k\u1ebft n\u1ed1i ho\u1eb7c d\u1ecbch v\u1ee5 x\u1eed l\u00fd vi\u1ec7c truy\u1ec1n t\u1ea3i. S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi ki\u1ec3m to\u00e1n b\u1ea3o m\u1eadt. N\u1ebfu d\u1eef li\u1ec7u ch\u1ea3y tr\u1ef1c ti\u1ebfp, s\u1ebd kh\u00f4ng c\u00f3 c\u01a1 h\u1ed9i cho x\u00e1c th\u1ef1c, ghi nh\u1eadt k\u00fd ho\u1eb7c m\u00e3 h\u00f3a trong ph\u1ea1m vi m\u00f4 h\u00ecnh h\u00f3a.<\/p>\n

      5. Quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean kh\u00f4ng nh\u1ea5t qu\u00e1n \ud83d\udcdd<\/h3>\n

      C\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn nhi\u1ec1u nh\u00f3m l\u00e0m vi\u1ec7c tr\u00ean c\u00f9ng m\u1ed9t t\u00e0i li\u1ec7u ki\u1ebfn tr\u00fac. Kh\u00f4ng c\u00f3 quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean nghi\u00eam ng\u1eb7t, m\u1ed9t nh\u00f3m c\u00f3 th\u1ec3 \u0111\u00e1nh nh\u00e3n m\u1ed9t lu\u1ed3ng l\u00e0 \u201c\u0110\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng\u201d, trong khi nh\u00f3m kh\u00e1c g\u1ecdi n\u00f3 l\u00e0 \u201cY\u00eau c\u1ea7u x\u00e1c th\u1ef1c\u201d. Nh\u1eefng kh\u00e1c bi\u1ec7t v\u1ec1 ng\u1eef ngh\u0129a n\u00e0y g\u00e2y nh\u1ea7m l\u1eabn trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra m\u00e3 ngu\u1ed3n v\u00e0 ki\u1ec3m th\u1eed.<\/p>\n

      M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c \u0111\u1eb7t t\u00ean m\u1ea1nh m\u1ebd y\u00eau c\u1ea7u:<\/p>\n

        \n
      • C\u1eb7p danh t\u1eeb-\u0111\u1ed9ng t\u1eeb:<\/strong>C\u00e1c qu\u00e1 tr\u00ecnh th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo c\u1ea5u tr\u00fac \u0110\u1ed9ng t\u1eeb-Danh t\u1eeb (v\u00ed d\u1ee5: \u201cT\u1ea1o b\u00e1o c\u00e1o\u201d).<\/li>\n
      • T\u00ean d\u1eef li\u1ec7u:<\/strong>C\u00e1c lu\u1ed3ng n\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo n\u1ed9i dung d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: \u201cChi ti\u1ebft h\u00f3a \u0111\u01a1n\u201d thay v\u00ec \u201cD\u1eef li\u1ec7u\u201d).<\/li>\n
      • Nh\u1ea5t qu\u00e1n:<\/strong>C\u00f9ng m\u1ed9t thu\u1eadt ng\u1eef ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00f9ng m\u1ed9t kh\u00e1i ni\u1ec7m \u1edf m\u1ecdi c\u1ea5p \u0111\u1ed9 s\u01a1 \u0111\u1ed3.<\/li>\n<\/ul>\n

        L\u1ed7i c\u1ea5p \u0111\u1ed9 v\u00e0 c\u00e2n b\u1eb1ng \u2696\ufe0f<\/h2>\n

        S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u l\u00e0 ph\u00e2n c\u1ea5p. S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh th\u1ec3 hi\u1ec7n h\u1ec7 th\u1ed1ng nh\u01b0 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t. S\u01a1 \u0111\u1ed3 M\u1ee9c 0 chia qu\u00e1 tr\u00ecnh \u0111\u00f3 th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh. S\u01a1 \u0111\u1ed3 M\u1ee9c 1 ph\u00e2n t\u00edch s\u00e2u h\u01a1n c\u00e1c qu\u00e1 tr\u00ecnh M\u1ee9c 0. M\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong ph\u00e2n c\u1ea5p n\u00e0y l\u00e0 \u201cc\u00e2n b\u1eb1ng\u201d.<\/p>\n

        C\u00e1c lu\u1ed3ng \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra ph\u1ea3i nh\u1ea5t qu\u00e1n \u1edf c\u00e1c c\u1ea5p \u0111\u1ed9. N\u1ebfu m\u1ed9t qu\u00e1 tr\u00ecnh M\u1ee9c 0 nh\u1eadn \u201cD\u1eef li\u1ec7u \u0111\u01a1n h\u00e0ng\u201d v\u00e0 \u201cD\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng\u201d, th\u00ec c\u00e1c s\u01a1 \u0111\u1ed3 M\u1ee9c 1 ph\u00e2n t\u00edch qu\u00e1 tr\u00ecnh \u0111\u00f3 c\u0169ng ph\u1ea3i nh\u1eadn \u201cD\u1eef li\u1ec7u \u0111\u01a1n h\u00e0ng\u201d v\u00e0 \u201cD\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng\u201d \u1edf \u0111\u1ea7u v\u00e0o. B\u1ea1n kh\u00f4ng th\u1ec3 th\u00eam \u0111\u1ea7u v\u00e0o ho\u1eb7c \u0111\u1ea7u ra m\u1edbi \u1edf c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n m\u00e0 kh\u00f4ng c\u00f3 thay \u0111\u1ed5i t\u01b0\u01a1ng \u1ee9ng \u1edf c\u1ea5p \u0111\u1ed9 cao h\u01a1n.<\/p>\n

        Vi ph\u1ea1m quy t\u1eafc n\u00e0y t\u1ea1o ra s\u1ef1 t\u00e1ch r\u1eddi gi\u1eefa b\u1ea3n t\u1ed5ng quan c\u1ea5p cao v\u00e0 b\u1ea3n tri\u1ec3n khai chi ti\u1ebft. Khi m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n xem s\u01a1 \u0111\u1ed3 M\u1ee9c 1, h\u1ecd c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y m\u1ed9t lu\u1ed3ng d\u1eef li\u1ec7u ch\u01b0a bao gi\u1edd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh, d\u1eabn \u0111\u1ebfn m\u1edf r\u1ed9ng ph\u1ea1m vi ho\u1eb7c c\u00e1c t\u00ednh n\u0103ng ch\u01b0a \u0111\u01b0\u1ee3c tri\u1ec3n khai.<\/p>\n

        B\u1ea3ng: So s\u00e1nh v\u00e0 c\u00e2n b\u1eb1ng c\u00e1c c\u1ea5p \u0111\u1ed9 DFD<\/h3>\n\n\n\n\n\n\n\n
        C\u1ea5p \u0111\u1ed9 s\u01a1 \u0111\u1ed3<\/th>\nTr\u1ecdng t\u00e2m<\/th>\nS\u1ed1 l\u01b0\u1ee3ng qu\u00e1 tr\u00ecnh<\/th>\nSai l\u1ea7m ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
        S\u01a1 \u0111\u1ed3 B\u1ed1i c\u1ea3nh<\/td>\nRanh gi\u1edbi h\u1ec7 th\u1ed1ng<\/td>\n1<\/td>\nQu\u00e1 nhi\u1ec1u chi ti\u1ebft ho\u1eb7c thi\u1ebfu c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i<\/td>\n<\/tr>\n
        M\u1ee9c 0 (C\u1ea5p cao nh\u1ea5t)<\/td>\nC\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh<\/td>\n3-7<\/td>\n\u0110\u1ea7u v\u00e0o\/\u0111\u1ea7u ra kh\u00f4ng kh\u1edbp v\u1edbi B\u1ed1i c\u1ea3nh<\/td>\n<\/tr>\n
        M\u1ee9c 1<\/td>\nLogic c\u1ee5 th\u1ec3<\/td>\n\u0110\u00e3 ph\u00e2n r\u00e3<\/td>\nD\u00f2ng ch\u1ea3y kh\u00f4ng c\u00e2n b\u1eb1ng so v\u1edbi quy tr\u00ecnh cha<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        H\u1ec7 qu\u1ea3 v\u1ec1 an ninh v\u00e0 qu\u1ea3n tr\u1ecb \ud83d\udd12<\/h2>\n

        Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p, s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) kh\u00f4ng ch\u1ec9 l\u00e0 c\u00f4ng c\u1ee5 thi\u1ebft k\u1ebf; n\u00f3 l\u00e0 m\u1ed9t t\u00e0i s\u1ea3n an ninh. Nh\u1eefng khi\u1ebfm khuy\u1ebft trong s\u01a1 \u0111\u1ed3 th\u01b0\u1eddng t\u01b0\u01a1ng quan v\u1edbi nh\u1eefng khi\u1ebfm khuy\u1ebft trong v\u1ecb th\u1ebf an ninh. Khi lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a sai, c\u00e1c danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp (ACL) th\u01b0\u1eddng b\u1ecb c\u1ea5u h\u00ecnh sai trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n.<\/p>\n

        1. \u0110\u1ed9 nh\u1ea1y d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a<\/h3>\n

        N\u1ebfu m\u1ed9t lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n l\u00e0 ‘B\u1ea3n ghi Nh\u00e2n vi\u00ean’ \u0111i qua m\u1ed9t quy tr\u00ecnh kh\u00f4ng x\u1eed l\u00fd m\u00e3 h\u00f3a, s\u01a1 \u0111\u1ed3 s\u1ebd kh\u00f4ng l\u00e0m n\u1ed5i b\u1eadt r\u1ee7i ro. C\u00e1c ti\u00eau chu\u1ea9n doanh nghi\u1ec7p th\u01b0\u1eddng y\u00eau c\u1ea7u \u0111\u00e1nh d\u1ea5u d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m. M\u1ed9t s\u01a1 \u0111\u1ed3 DFD n\u00ean \u0111\u01b0\u1ee3c ghi ch\u00fa l\u00fd t\u01b0\u1edfng l\u00e0 c\u00e1c lu\u1ed3ng v\u1edbi m\u1ee9c \u0111\u1ed9 nh\u1ea1y c\u1ea3m (v\u00ed d\u1ee5: C\u00f4ng khai, N\u1ed9i b\u1ed9, B\u1ea3o m\u1eadt). B\u1ecf qua \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 tu\u00e2n th\u1ee7 v\u1edbi c\u00e1c quy \u0111\u1ecbnh nh\u01b0 GDPR ho\u1eb7c HIPAA.<\/p>\n

        2. Thi\u1ebfu d\u1ea5u v\u1ebft ki\u1ec3m to\u00e1n<\/h3>\n

        M\u1ecdi quy tr\u00ecnh thay \u0111\u1ed5i d\u1eef li\u1ec7u n\u00ean \u0111\u01b0\u1ee3c truy v\u1ebft l\u00fd t\u01b0\u1edfng. N\u1ebfu s\u01a1 \u0111\u1ed3 DFD cho th\u1ea5y d\u1eef li\u1ec7u di chuy\u1ec3n t\u1eeb m\u1ed9t Quy tr\u00ecnh sang m\u1ed9t Kho m\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ecbnh danh r\u00f5 r\u00e0ng cho ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c phi\u00ean l\u00e0m vi\u1ec7c, vi\u1ec7c ki\u1ec3m to\u00e1n tr\u1edf n\u00ean b\u1ea5t kh\u1ea3 thi. C\u00e1c nh\u00f3m th\u01b0\u1eddng qu\u00ean m\u00f4 h\u00ecnh h\u00f3a c\u00e1c lu\u1ed3ng ‘ID Phi\u00ean’ ho\u1eb7c ‘Token Ki\u1ec3m to\u00e1n’ nh\u1eb1m theo d\u00f5i ai \u0111\u00e3 thay \u0111\u1ed5i g\u00ec v\u00e0 khi n\u00e0o.<\/p>\n

        3. Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n cho s\u01a1 \u0111\u1ed3<\/h3>\n

        Kh\u00e1c v\u1edbi m\u00e3 ngu\u1ed3n, s\u01a1 \u0111\u1ed3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u01b0u d\u01b0\u1edbi d\u1ea1ng h\u00ecnh \u1ea3nh t\u0129nh ho\u1eb7c c\u00e1c t\u1ec7p r\u1eddi r\u1ea1c. Khi s\u01a1 \u0111\u1ed3 thay \u0111\u1ed5i, l\u1ecbch s\u1eed phi\u00ean b\u1ea3n th\u01b0\u1eddng b\u1ecb m\u1ea5t. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n l\u00e0m vi\u1ec7c d\u1ef1a tr\u00ean b\u1ea3n v\u1ebd c\u0169. M\u1ed9t m\u00f4 h\u00ecnh qu\u1ea3n tr\u1ecb v\u1eefng ch\u1eafc coi DFD l\u00e0 t\u00e0i li\u1ec7u s\u1ed1ng, \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong kho l\u01b0u tr\u1eef ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n c\u00f9ng v\u1edbi m\u00e3 ngu\u1ed3n.<\/p>\n

        C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho b\u1ea3o tr\u00ec v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \ud83d\udee0\ufe0f<\/h2>\n

        Ngay c\u1ea3 m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c v\u1ebd ho\u00e0n h\u1ea3o c\u0169ng c\u00f3 th\u1ec3 tr\u1edf n\u00ean l\u1ed7i th\u1eddi nhanh ch\u00f3ng. C\u00e1c h\u1ec7 th\u1ed1ng doanh nghi\u1ec7p kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n. C\u00e1c t\u00edch h\u1ee3p m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o, v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n c\u0169 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf. \u0110\u1ec3 duy tr\u00ec gi\u00e1 tr\u1ecb c\u1ee7a DFD, c\u00e1c nh\u00f3m ph\u1ea3i \u00e1p d\u1ee5ng c\u00e1c th\u1ef1c h\u00e0nh b\u1ea3o tr\u00ec c\u1ee5 th\u1ec3.<\/p>\n

          \n
        • T\u00edch h\u1ee3p v\u1edbi Ph\u00e1t tri\u1ec3n:<\/strong> S\u01a1 \u0111\u1ed3 ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n trong \u0111\u1ecbnh ngh\u0129a ho\u00e0n th\u00e0nh. M\u1ed9t t\u00ednh n\u0103ng kh\u00f4ng \u0111\u01b0\u1ee3c coi l\u00e0 ho\u00e0n t\u1ea5t cho \u0111\u1ebfn khi DFD \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt \u0111\u1ec3 ph\u1ea3n \u00e1nh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u m\u1edbi.<\/li>\n
        • \u0110\u00e1nh gi\u00e1 \u0111\u1ecbnh k\u1ef3:<\/strong> L\u00ean l\u1ecbch \u0111\u00e1nh gi\u00e1 \u0111\u1ecbnh k\u1ef3 h\u00e0ng qu\u00fd t\u00e0i li\u1ec7u ki\u1ebfn tr\u00fac. M\u1eddi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0, nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 nh\u00e2n vi\u00ean an ninh x\u00e1c nh\u1eadn c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u so v\u1edbi h\u00e0nh vi th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
        • T\u1ef1 \u0111\u1ed9ng h\u00f3a \u1edf m\u1ee9c c\u00f3 th\u1ec3:<\/strong> M\u1eb7c d\u00f9 m\u00f4 h\u00ecnh h\u00f3a th\u1ee7 c\u00f4ng l\u00e0 ph\u1ed5 bi\u1ebfn, m\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a cho ph\u00e9p \u0111\u1ed3ng b\u1ed9 h\u00f3a v\u1edbi m\u00e3 ngu\u1ed3n ho\u1eb7c t\u1ec7p c\u1ea5u h\u00ecnh. \u0110i\u1ec1u n\u00e0y gi\u1ea3m thi\u1ec3u kh\u1ea3 n\u0103ng l\u1ed7i do con ng\u01b0\u1eddi khi c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3.<\/li>\n
        • Ch\u1ee7 s\u1edf h\u1eefu r\u00f5 r\u00e0ng:<\/strong> Giao cho m\u1ed9t ki\u1ebfn tr\u00fac s\u01b0 ho\u1eb7c ng\u01b0\u1eddi \u0111\u1ee9ng \u0111\u1ea7u k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3 l\u00e0m ch\u1ee7 s\u1edf h\u1eefu c\u1ee7a DFD. S\u1ef1 m\u01a1 h\u1ed3 v\u1ec1 ai s\u1ebd c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng \u0111\u00ecnh tr\u1ec7.<\/li>\n<\/ul>\n

          B\u1ea3ng: C\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn so v\u1edbi C\u00e1ch ti\u1ebfp c\u1eadn \u0111\u00fang<\/h3>\n\n\n\n\n\n\n\n\n
          Lo\u1ea1i l\u1ed7i<\/th>\nT\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 x\u1ea3y ra<\/th>\nC\u00e1ch ti\u1ebfp c\u1eadn \u0111\u00fang<\/th>\n<\/tr>\n<\/thead>\n
          Thi\u1ebfu Kho d\u1eef li\u1ec7u<\/td>\nGi\u1ea3 \u0111\u1ecbnh d\u1eef li\u1ec7u \u0111i qua m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef<\/td>\nX\u00e1c \u0111\u1ecbnh y\u00eau c\u1ea7u l\u01b0u tr\u1eef b\u1ec1n v\u1eefng cho m\u1ed7i quy tr\u00ecnh<\/td>\n<\/tr>\n
          Lu\u1ed3ng kh\u00f4ng c\u00e2n b\u1eb1ng<\/td>\nPh\u00e2n r\u00e3 quy tr\u00ecnh m\u00e0 kh\u00f4ng theo d\u00f5i \u0111\u1ea7u v\u00e0o<\/td>\n\u0110\u1ea3m b\u1ea3o \u0111\u1ea7u v\u00e0o\/\u0111\u1ea7u ra kh\u1edbp ch\u00ednh x\u00e1c v\u1edbi quy tr\u00ecnh cha<\/td>\n<\/tr>\n
          Nh\u00e3n m\u01a1 h\u1ed3<\/td>\nS\u1eed d\u1ee5ng c\u00e1c thu\u1eadt ng\u1eef chung nh\u01b0 \u201cTh\u00f4ng tin\u201d ho\u1eb7c \u201cD\u1eef li\u1ec7u\u201d<\/td>\nS\u1eed d\u1ee5ng t\u00ean d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: \u201cS\u1ed1 th\u1ebb t\u00edn d\u1ee5ng\u201d)<\/td>\n<\/tr>\n
          K\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3<\/td>\nB\u1ecf qua ranh gi\u1edbi h\u1ec7 th\u1ed1ng<\/td>\n\u0110i\u1ec1u h\u01b0\u1edbng t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u b\u00ean ngo\u00e0i th\u00f4ng qua m\u1ed9t qu\u00e1 tr\u00ecnh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          X\u1eed l\u00fd c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 v\u00e0 t\u00edch h\u1ee3p \ud83d\udd04<\/h2>\n

          M\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c kh\u00f3 kh\u0103n nh\u1ea5t trong vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a DFD doanh nghi\u1ec7p l\u00e0 t\u00edch h\u1ee3p c\u00e1c h\u1ec7 th\u1ed1ng c\u0169. C\u00e1c h\u1ec7 th\u1ed1ng c\u0169 th\u01b0\u1eddng c\u00f3 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a ho\u1eb7c c\u00e1c giao th\u1ee9c ri\u00eang bi\u1ec7t. Khi m\u00f4 h\u00ecnh h\u00f3a nh\u1eefng h\u1ec7 th\u1ed1ng n\u00e0y, c\u00e1c nh\u00f3m th\u01b0\u1eddng \u0111\u01b0a ra nh\u1eefng gi\u1ea3 \u0111\u1ecbnh sai l\u1ec7ch.<\/p>\n

          V\u00ed d\u1ee5, m\u1ed9t m\u00e1y ch\u1ee7 c\u0169 c\u00f3 th\u1ec3 g\u1eedi d\u1eef li\u1ec7u theo \u0111\u1ecbnh d\u1ea1ng chi\u1ec1u r\u1ed9ng c\u1ed1 \u0111\u1ecbnh, tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t tr\u01b0\u1eddng nh\u01b0ng th\u1ef1c t\u1ebf l\u00e0 ba gi\u00e1 tr\u1ecb n\u1ed1i ti\u1ebfp nhau. N\u1ebfu DFD m\u00f4 h\u00ecnh h\u00f3a \u0111i\u1ec1u n\u00e0y nh\u01b0 m\u1ed9t tr\u01b0\u1eddng duy nh\u1ea5t, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n ph\u00eda sau s\u1ebd kh\u00f4ng th\u1ec3 ph\u00e2n t\u00edch d\u1eef li\u1ec7u \u0111\u00fang c\u00e1ch. Vi\u1ec7c ph\u1ecfng v\u1ea5n ch\u1ee7 s\u1edf h\u1eefu h\u1ec7 th\u1ed1ng c\u0169 v\u00e0 hi\u1ec3u r\u00f5 n\u1ed9i dung d\u1eef li\u1ec7u th\u1ef1c t\u1ebf, ch\u1ee9 kh\u00f4ng ch\u1ec9 giao di\u1ec7n, l\u00e0 \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng.<\/p>\n

          Khi m\u00f4 h\u00ecnh h\u00f3a t\u00edch h\u1ee3p:<\/p>\n

            \n
          • B\u1ea3n \u0111\u1ed3 giao di\u1ec7n:<\/strong>Hi\u1ec3n th\u1ecb \u0111\u1ecbnh d\u1ea1ng tin nh\u1eafn c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: XML, JSON, CSV) n\u1ebfu c\u00f3 li\u00ean quan \u0111\u1ebfn lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n
          • Nh\u1ea5n m\u1ea1nh qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i:<\/strong>N\u1ebfu h\u1ec7 th\u1ed1ng m\u1edbi chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u0169, h\u00e3y m\u00f4 h\u00ecnh h\u00f3a r\u00f5 r\u00e0ng qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i \u0111\u00f3.<\/li>\n
          • T\u00e0i li\u1ec7u c\u00e1c gi\u1edbi h\u1ea1n:<\/strong>N\u1ebfu h\u1ec7 th\u1ed1ng c\u0169 c\u00f3 gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u (v\u00ed d\u1ee5: 255 k\u00fd t\u1ef1), h\u00e3y ghi ch\u00fa \u0111i\u1ec1u n\u00e0y tr\u00ean nh\u00e3n lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

            Vai tr\u00f2 c\u1ee7a giao ti\u1ebfp trong m\u00f4 h\u00ecnh h\u00f3a \ud83d\udde3\ufe0f<\/h2>\n

            Th\u01b0\u1eddng xuy\u00ean, c\u00e1c l\u1ed7i DFD xu\u1ea5t ph\u00e1t t\u1eeb kho\u1ea3ng c\u00e1ch giao ti\u1ebfp gi\u1eefa c\u00e1c nh\u00e0 ph\u00e2n t\u00edch kinh doanh v\u00e0 c\u00e1c nh\u00f3m k\u1ef9 thu\u1eadt. C\u00e1c b\u00ean li\u00ean quan kinh doanh m\u00f4 t\u1ea3 quy tr\u00ecnh l\u00e0m vi\u1ec7c b\u1eb1ng ng\u00f4n ng\u1eef k\u1ec3 chuy\u1ec7n, trong khi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n suy ngh\u0129 theo c\u1ea5u tr\u00fac logic. DFD ch\u00ednh l\u00e0 l\u1edbp d\u1ecbch thu\u1eadt gi\u1eefa hai nh\u00f3m n\u00e0y.<\/p>\n

            N\u1ebfu s\u01a1 \u0111\u1ed3 qu\u00e1 k\u1ef9 thu\u1eadt, c\u00e1c b\u00ean li\u00ean quan kinh doanh kh\u00f4ng th\u1ec3 x\u00e1c minh logic. N\u1ebfu qu\u00e1 tr\u1eebu t\u01b0\u1ee3ng, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n kh\u00f4ng th\u1ec3 x\u00e2y d\u1ef1ng gi\u1ea3i ph\u00e1p. Vi\u1ec7c t\u00ecm ra \u0111i\u1ec3m c\u00e2n b\u1eb1ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef ch\u00ednh x\u00e1c nh\u01b0ng d\u1ec5 ti\u1ebfp c\u1eadn. Tr\u00e1nh c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng qu\u00e1 ph\u1ee9c t\u1ea1p l\u00e0m che khu\u1ea5t lu\u1ed3ng d\u1eef li\u1ec7u.<\/p>\n

            C\u00e1c bu\u1ed5i l\u00e0m vi\u1ec7c hi\u1ec7u qu\u1ea3 trong vi\u1ec7c gi\u1ea3i quy\u1ebft nh\u1eefng b\u1ea5t \u0111\u1ed3ng n\u00e0y. T\u1eadp h\u1ee3p \u0111\u1ed9i ng\u0169 v\u00e0 \u0111i qua s\u01a1 \u0111\u1ed3 t\u1eebng b\u01b0\u1edbc m\u1ed9t. \u0110\u1eb7t c\u00e1c c\u00e2u h\u1ecfi nh\u01b0, \u201cD\u1eef li\u1ec7u n\u00e0y \u0111\u1ebfn t\u1eeb \u0111\u00e2u?\u201d v\u00e0 \u201c\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu qu\u00e1 tr\u00ecnh n\u00e0y th\u1ea5t b\u1ea1i?\u201d Nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y th\u01b0\u1eddng ti\u1ebft l\u1ed9 c\u00e1c lu\u1ed3ng b\u1ecb thi\u1ebfu ho\u1eb7c c\u00e1c tr\u1ea1ng th\u00e1i l\u1ed7i ch\u01b0a \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a.<\/p>\n

            K\u1ebft lu\u1eadn v\u1ec1 t\u00ednh nghi\u00eam ng\u1eb7t v\u00e0 \u0111\u1ed9 tin c\u1eady \u2705<\/h2>\n

            Vi\u1ec7c t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u ch\u00ednh x\u00e1c kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 v\u1ebd c\u00e1c \u0111\u01b0\u1eddng n\u00e9t; \u0111\u00f3 l\u00e0 vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ef1 th\u1eadt v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n trong t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n. Trong c\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p, chi ph\u00ed sai s\u00f3t l\u00e0 r\u1ea5t cao. C\u00e1c v\u1ee5 r\u00f2 r\u1ec9 b\u1ea3o m\u1eadt, m\u1ea5t d\u1eef li\u1ec7u v\u00e0 c\u00f4ng vi\u1ec7c ph\u1ea3i l\u00e0m l\u1ea1i l\u00e0 h\u1ec7 qu\u1ea3 tr\u1ef1c ti\u1ebfp t\u1eeb t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac b\u1ecb l\u1ed7i.<\/p>\n

            B\u1eb1ng c\u00e1ch tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c n\u00eau trong h\u01b0\u1edbng d\u1eabn n\u00e0y\u2014nh\u01b0 c\u00e1c lu\u1ed3ng \u1ea3o, c\u00e1c c\u1ea5p \u0111\u1ed9 m\u1ea5t c\u00e2n b\u1eb1ng v\u00e0 t\u00ean g\u1ecdi m\u01a1 h\u1ed3\u2014c\u00e1c nh\u00f3m c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh. Xem DFD nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng s\u1ed1ng \u0111\u1ed9ng gi\u1eefa y\u00eau c\u1ea7u kinh doanh v\u00e0 tri\u1ec3n khai k\u1ef9 thu\u1eadt. C\u00e1c cu\u1ed9c ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3, qu\u1ea3n l\u00fd nghi\u00eam ng\u1eb7t v\u00e0 giao ti\u1ebfp r\u00f5 r\u00e0ng \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 lu\u00f4n l\u00e0 t\u00e0i s\u1ea3n qu\u00fd gi\u00e1 trong su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n.<\/p>\n

            \u0110\u1ea7u t\u01b0 th\u1eddi gian v\u00e0o vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a \u0111\u00fang c\u00e1ch s\u1ebd ti\u1ebft ki\u1ec7m th\u1eddi gian ki\u1ec3m tra l\u1ed7i sau n\u00e0y. M\u1ed9t s\u01a1 \u0111\u1ed3 DFD \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac t\u1ed1t l\u00e0m r\u00f5 ph\u1ea1m vi, l\u00e0m n\u1ed5i b\u1eadt c\u00e1c r\u1ee7i ro b\u1ea3o m\u1eadt v\u00e0 d\u1eabn d\u1eaft c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ebfn m\u1ed9t tri\u1ec3n khai nh\u1ea5t qu\u00e1n. Trong th\u1ebf gi\u1edbi ph\u1ee9c t\u1ea1p c\u1ee7a ki\u1ebfn tr\u00fac doanh nghi\u1ec7p, s\u1ef1 r\u00f5 r\u00e0ng l\u00e0 c\u00f4ng c\u1ee5 m\u1ea1nh nh\u1ea5t hi\u1ec7n c\u00f3.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p ph\u1ee9c t\u1ea1p, ki\u1ebfn tr\u00fac th\u00f4ng tin quan tr\u1ecdng kh\u00f4ng k\u00e9m g\u00ec m\u00e3 ngu\u1ed3n x\u1eed l\u00fd n\u00f3. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) \u0111\u00f3ng vai tr\u00f2…<\/p>\n","protected":false},"author":1,"featured_media":1824,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Tr\u00e1nh c\u00e1c sai l\u1ea7m DFD trong c\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p | H\u01b0\u1edbng d\u1eabn \ud83d\udeab","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch tr\u00e1nh c\u00e1c sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u trong c\u00e1c d\u1ef1 \u00e1n doanh nghi\u1ec7p. 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