{"id":505,"date":"2026-03-21T18:05:15","date_gmt":"2026-03-21T18:05:15","guid":{"rendered":"https:\/\/www.go-minder.com\/vi\/common-use-case-diagram-mistakes-how-to-avoid-them\/"},"modified":"2026-03-21T18:05:15","modified_gmt":"2026-03-21T18:05:15","slug":"common-use-case-diagram-mistakes-how-to-avoid-them","status":"publish","type":"post","link":"https:\/\/www.go-minder.com\/vi\/common-use-case-diagram-mistakes-how-to-avoid-them\/","title":{"rendered":"Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng UML v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang"},"content":{"rendered":"<p>Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng UML l\u00e0 b\u01b0\u1edbc n\u1ec1n t\u1ea3ng trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m. N\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u1ea7u n\u1ed1i gi\u1eefa y\u00eau c\u1ea7u kinh doanh v\u00e0 tri\u1ec3n khai k\u1ef9 thu\u1eadt. Tuy nhi\u00ean, ngay c\u1ea3 nh\u1eefng nh\u00e0 ph\u00e2n t\u00edch c\u00f3 kinh nghi\u1ec7m c\u0169ng th\u01b0\u1eddng m\u1eafc ph\u1ea3i nh\u1eefng sai s\u00f3t tinh vi c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 m\u01a1 h\u1ed3 trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n sau n\u00e0y. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t trong m\u00f4 h\u00ecnh h\u00f3a tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng v\u00e0 cung c\u1ea5p c\u00e1c chi\u1ebfn l\u01b0\u1ee3c r\u00f5 r\u00e0ng \u0111\u1ec3 kh\u1eafc ph\u1ee5c ch\u00fang.<\/p>\n<p>M\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1ed1t s\u1ebd l\u00e0m r\u00f5 ph\u1ea1m vi c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u00f3. Khi \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u00fang, s\u01a1 \u0111\u1ed3 n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa c\u00e1c b\u00ean li\u00ean quan v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n. Khi th\u1ef1c hi\u1ec7n k\u00e9m, n\u00f3 tr\u1edf th\u00e0nh ngu\u1ed3n g\u00e2y nh\u1ea7m l\u1eabn v\u00e0 ph\u1ea3i l\u00e0m l\u1ea1i. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c khu v\u1ef1c c\u1ee5 th\u1ec3 n\u01a1i sai l\u1ea7m th\u01b0\u1eddng x\u1ea3y ra, t\u1eeb vi\u1ec7c x\u00e1c \u0111\u1ecbnh ng\u01b0\u1eddi tham gia \u0111\u1ebfn \u0111\u1ecbnh ngh\u0129a c\u00e1c m\u1ed1i quan h\u1ec7.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Charcoal sketch infographic summarizing six common UML use case diagram mistakes: confusing actors with users, misusing include\/extend relationships, ignoring system boundaries, inconsistent granularity, poor naming conventions, and visual clutter. Each mistake includes a sketched icon and correction strategy, plus a final quality checklist for clean modeling.\" decoding=\"async\" src=\"https:\/\/www.go-minder.com\/wp-content\/uploads\/2026\/03\/use-case-diagram-mistakes-infographic-charcoal-sketch.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83e\uddd0 Sai l\u1ea7m 1: Nh\u1ea7m l\u1eabn gi\u1eefa ng\u01b0\u1eddi tham gia v\u00e0 ng\u01b0\u1eddi d\u00f9ng<\/h2>\n<p>M\u1ed9t trong nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111\u1ecbnh ngh\u0129a ng\u01b0\u1eddi tham gia. Nhi\u1ec1u nh\u00e0 thi\u1ebft k\u1ebf cho r\u1eb1ng m\u1ecdi ng\u01b0\u1eddi t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng \u0111\u1ec1u l\u00e0 ng\u01b0\u1eddi tham gia. \u0110i\u1ec1u n\u00e0y l\u00e0 sai. Ng\u01b0\u1eddi tham gia \u0111\u1ea1i di\u1ec7n cho m\u1ed9t vai tr\u00f2, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t c\u00e1 nh\u00e2n c\u1ee5 th\u1ec3. Vi\u1ec7c nh\u1ea7m l\u1eabn gi\u1eefa hai kh\u00e1i ni\u1ec7m n\u00e0y t\u1ea1o ra s\u1ef1 c\u1ee9ng nh\u1eafc trong thi\u1ebft k\u1ebf.<\/p>\n<ul>\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p sai l\u1ea7m:<\/strong>\u0110\u1ecbnh ngh\u0129a \u201cJohn Smith\u201d l\u00e0 m\u1ed9t ng\u01b0\u1eddi tham gia. N\u1ebfu John r\u1eddi c\u00f4ng ty, s\u01a1 \u0111\u1ed3 ph\u1ea3i \u0111\u01b0\u1ee3c v\u1ebd l\u1ea1i.<\/li>\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fang \u0111\u1eafn:<\/strong>\u0110\u1ecbnh ngh\u0129a \u201cGi\u00e1m \u0111\u1ed1c b\u00e1n h\u00e0ng\u201d l\u00e0 ng\u01b0\u1eddi tham gia. B\u1ea5t k\u1ef3 ai \u0111\u1ea3m nh\u1eadn vai tr\u00f2 \u0111\u00f3 \u0111\u1ec1u \u0111\u01b0\u1ee3c bao g\u1ed3m.<\/li>\n<\/ul>\n<p>Ng\u01b0\u1eddi tham gia l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i h\u1ec7 th\u1ed1ng m\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u00f3. Th\u1ef1c th\u1ec3 n\u00e0y c\u00f3 th\u1ec3 l\u00e0 con ng\u01b0\u1eddi, m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t then ch\u1ed1t l\u00e0 ng\u01b0\u1eddi tham gia cung c\u1ea5p \u0111\u1ea7u v\u00e0o ho\u1eb7c nh\u1eadn \u0111\u1ea7u ra nh\u01b0ng kh\u00f4ng n\u1eb1m trong bi\u00ean gi\u1edbi c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h3>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng<\/h3>\n<p>Khi b\u1ea1n m\u00f4 h\u00ecnh h\u00f3a nh\u1eefng c\u00e1 nh\u00e2n c\u1ee5 th\u1ec3 thay v\u00ec vai tr\u00f2, thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng s\u1ebd b\u1ecb g\u1eafn k\u1ebft v\u1edbi con ng\u01b0\u1eddi thay v\u00ec ch\u1ee9c n\u0103ng. N\u1ebfu m\u1ed9t nh\u00e2n vi\u00ean m\u1edbi \u0111\u1ea3m nh\u1eadn vai tr\u00f2 \u201cGi\u00e1m \u0111\u1ed1c b\u00e1n h\u00e0ng\u201d, logic v\u1eabn gi\u1eef nguy\u00ean. N\u1ebfu b\u1ea1n m\u00f4 h\u00ecnh h\u00f3a \u201cJohn Smith\u201d, c\u00e1c y\u00eau c\u1ea7u c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ebd thay \u0111\u1ed5i t\u00f9y theo ai \u0111ang gi\u1eef v\u1ecb tr\u00ed \u0111\u00f3.<\/p>\n<ul>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong>Ng\u01b0\u1eddi tham gia d\u1ef1a tr\u00ean vai tr\u00f2 cho ph\u00e9p h\u1ec7 th\u1ed1ng m\u1edf r\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i s\u01a1 \u0111\u1ed3.<\/li>\n<li><strong>T\u00ednh minh b\u1ea1ch:<\/strong>C\u00e1c b\u00ean li\u00ean quan hi\u1ec3u r\u00f5 tr\u00e1ch nhi\u1ec7m c\u1ee7a m\u00ecnh h\u01a1n khi c\u00e1c vai tr\u00f2 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/li>\n<\/ul>\n<h2>\ud83d\udd17 Sai l\u1ea7m 2: S\u1eed d\u1ee5ng sai m\u1ed1i quan h\u1ec7 \u00abinclude\u00bb v\u00e0 \u00abextend\u00bb<\/h2>\n<p>C\u00e1c m\u1ed1i quan h\u1ec7 x\u00e1c \u0111\u1ecbnh lu\u1ed3ng h\u00e0nh vi gi\u1eefa c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng. C\u00e1c m\u0169i t\u00ean \u0111\u01b0\u1ee3c g\u00e1n nh\u00e3n \u00abinclude\u00bb v\u00e0 \u00abextend\u00bb th\u01b0\u1eddng b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c ho\u1eb7c \u00e1p d\u1ee5ng sai. Nh\u1eefng m\u1ed1i quan h\u1ec7 n\u00e0y c\u00f3 \u00fd ngh\u0129a ng\u1eef ngh\u0129a ri\u00eang bi\u1ec7t, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn logic c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h3>Hi\u1ec3u v\u1ec1 \u00abinclude\u00bb<\/h3>\n<p>M\u1ed1i quan h\u1ec7 \u00abinclude\u00bb cho bi\u1ebft r\u1eb1ng m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<em>ph\u1ea3i<\/em>tham gia v\u00e0o h\u00e0nh vi c\u1ee7a m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00e1c. \u0110\u00e2y l\u00e0 b\u1eaft bu\u1ed9c. Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u01a1 s\u1edf \u1ee7y quy\u1ec1n h\u00e0nh vi c\u1ee5 th\u1ec3 cho tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c bao g\u1ed3m \u0111\u1ec3 gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p.<\/p>\n<ul>\n<li><strong>V\u00ed d\u1ee5:<\/strong>M\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u201cR\u00fat ti\u1ec1n\u201d bao g\u1ed3m \u201cX\u00e1c minh m\u00e3 PIN\u201d. B\u1ea1n kh\u00f4ng th\u1ec3 r\u00fat ti\u1ec1n n\u1ebfu kh\u00f4ng x\u00e1c minh m\u00e3 PIN.<\/li>\n<li><strong>H\u01b0\u1edbng:<\/strong>M\u0169i t\u00ean ch\u1ec9 t\u1eeb tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u01a1 s\u1edf \u0111\u1ebfn tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c bao g\u1ed3m.<\/li>\n<\/ul>\n<h3>Hi\u1ec3u v\u1ec1 \u00abextend\u00bb<\/h3>\n<p>M\u1ed1i quan h\u1ec7 \u00abextend\u00bb cho bi\u1ebft h\u00e0nh vi t\u00f9y ch\u1ecdn. N\u00f3 x\u1ea3y ra d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3. Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng m\u1edf r\u1ed9ng th\u00eam ch\u1ee9c n\u0103ng cho tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u01a1 s\u1edf nh\u01b0ng kh\u00f4ng b\u1eaft bu\u1ed9c \u0111\u1ec3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u01a1 s\u1edf ho\u00e0n th\u00e0nh.<\/p>\n<ul>\n<li><strong>V\u00ed d\u1ee5:<\/strong>M\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u201c\u0110\u1eb7t h\u00e0ng\u201d c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng b\u1edfi \u201c\u00c1p d\u1ee5ng m\u00e3 gi\u1ea3m gi\u00e1\u201d. \u0110\u01a1n h\u00e0ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t m\u00e0 kh\u00f4ng c\u1ea7n m\u00e3 gi\u1ea3m gi\u00e1.<\/li>\n<li><strong>H\u01b0\u1edbng:<\/strong>M\u0169i t\u00ean ch\u1ec9 t\u1eeb use case m\u1edf r\u1ed9ng \u0111\u1ebfn use case c\u01a1 s\u1edf.<\/li>\n<\/ul>\n<h3>S\u1ef1 nh\u1ea7m l\u1eabn ph\u1ed5 bi\u1ebfn<\/h3>\n<p>C\u00e1c nh\u00e0 thi\u1ebft k\u1ebf th\u01b0\u1eddng d\u00f9ng \u00abinclude\u00bb cho c\u00e1c b\u01b0\u1edbc t\u00f9y ch\u1ecdn ho\u1eb7c \u00abextend\u00bb cho c\u00e1c b\u01b0\u1edbc b\u1eaft bu\u1ed9c. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3o ng\u01b0\u1ee3c logic lu\u1ed3ng h\u1ec7 th\u1ed1ng. N\u1ebfu m\u1ed9t b\u01b0\u1edbc l\u00e0 b\u1eaft bu\u1ed9c, n\u00f3 ph\u1ea3i n\u1eb1m trong lu\u1ed3ng ch\u00ednh ho\u1eb7c th\u00f4ng qua \u00abinclude\u00bb. N\u1ebfu n\u00f3 mang t\u00ednh t\u00ecnh hu\u1ed1ng, h\u00e3y d\u00f9ng \u00abextend\u00bb.<\/p>\n<h2>\ud83d\udce6 Sai l\u1ea7m 3: B\u1ecf qua ranh gi\u1edbi h\u1ec7 th\u1ed1ng<\/h2>\n<p>Ranh gi\u1edbi h\u1ec7 th\u1ed1ng l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt t\u00e1ch bi\u1ec7t c\u00e1c quy tr\u00ecnh n\u1ed9i b\u1ed9 kh\u1ecfi c\u00e1c t\u00e1c nh\u00e2n b\u00ean ngo\u00e0i. M\u1ed9t sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 v\u1ebd ranh gi\u1edbi n\u00e0y l\u1ecfng l\u1ebbo ho\u1eb7c kh\u00f4ng nh\u1ea5t qu\u00e1n. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 m\u01a1 h\u1ed3 v\u1ec1 vi\u1ec7c h\u1ec7 th\u1ed1ng l\u00e0m g\u00ec v\u00e0 m\u00f4i tr\u01b0\u1eddng l\u00e0m g\u00ec.<\/p>\n<ul>\n<li><strong>S\u1ef1 lan r\u1ed9ng ranh gi\u1edbi:<\/strong>Bao g\u1ed3m c\u00e1c quy tr\u00ecnh n\u00ean n\u1eb1m ngo\u00e0i h\u1ec7 th\u1ed1ng. V\u00ed d\u1ee5, \u201cX\u1eed l\u00fd thanh to\u00e1n\u201d n\u00ean n\u1eb1m b\u00ean trong n\u1ebfu h\u1ec7 th\u1ed1ng t\u1ef1 x\u1eed l\u00fd. N\u1ebfu h\u1ec7 th\u1ed1ng g\u1ecdi API ng\u00e2n h\u00e0ng b\u00ean ngo\u00e0i, th\u00ec ng\u00e2n h\u00e0ng l\u00e0 m\u1ed9t t\u00e1c nh\u00e2n.<\/li>\n<li><strong>Thi\u1ebfu ranh gi\u1edbi:<\/strong>Kh\u00f4ng v\u1ebd khung bao quanh c\u00e1c use case. \u0110i\u1ec1u n\u00e0y khi\u1ebfn s\u01a1 \u0111\u1ed3 tr\u00f4ng gi\u1ed1ng nh\u01b0 danh s\u00e1ch c\u00e1c nhi\u1ec7m v\u1ee5 thay v\u00ec m\u00f4 h\u00ecnh h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n<p>M\u1ed9t ranh gi\u1edbi r\u00f5 r\u00e0ng gi\u00fap c\u00e1c b\u00ean li\u00ean quan hi\u1ec3u \u0111\u01b0\u1ee3c ph\u1ea1m vi d\u1ef1 \u00e1n. M\u1ecdi th\u1ee9 n\u1eb1m ngo\u00e0i khung l\u00e0 ngo\u00e0i ph\u1ea1m vi cho chu k\u1ef3 ph\u00e1t tri\u1ec3n hi\u1ec7n t\u1ea1i.<\/p>\n<h2>\ud83d\udd0d Sai l\u1ea7m 4: \u0110\u1ed9 chi ti\u1ebft kh\u00f4ng nh\u1ea5t qu\u00e1n<\/h2>\n<p>\u0110\u1ed9 chi ti\u1ebft \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 chi ti\u1ebft trong m\u1ed9t use case. M\u1ed9t s\u01a1 \u0111\u1ed3 kh\u00f4ng n\u00ean tr\u1ed9n l\u1eabn c\u00e1c m\u1ee5c ti\u00eau c\u1ea5p cao v\u1edbi c\u00e1c b\u01b0\u1edbc h\u1ec7 th\u1ed1ng c\u1ea5p th\u1ea5p. N\u1ebfu m\u1ed9t use case l\u00e0 \u201cQu\u1ea3n l\u00fd h\u1ec7 th\u1ed1ng\u201d v\u00e0 m\u1ed9t use case kh\u00e1c l\u00e0 \u201cNh\u1ea5n n\u00fat A\u201d, s\u01a1 \u0111\u1ed3 s\u1ebd g\u00e2y nh\u1ea7m l\u1eabn.<\/p>\n<h3>Qu\u00e1 c\u1ea5p cao<\/h3>\n<p>C\u00e1c use case nh\u01b0 \u201cQu\u1ea3n l\u00fd h\u1ec7 th\u1ed1ng\u201d qu\u00e1 r\u1ed9ng. Ch\u00fang kh\u00f4ng m\u00f4 t\u1ea3 m\u1ee5c ti\u00eau t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3. C\u00e1c b\u00ean li\u00ean quan kh\u00f4ng th\u1ec3 x\u00e1c minh y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi m\u1ed9t m\u1ee5c ti\u00eau m\u01a1 h\u1ed3.<\/p>\n<h3>Qu\u00e1 chi ti\u1ebft<\/h3>\n<p>C\u00e1c use case nh\u01b0 \u201cHi\u1ec3n th\u1ecb m\u00e0n h\u00ecnh \u0111\u0103ng nh\u1eadp\u201d qu\u00e1 chi ti\u1ebft. \u0110\u00e2y l\u00e0 c\u00e1c thao t\u00e1c giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng, kh\u00f4ng ph\u1ea3i ch\u1ee9c n\u0103ng h\u1ec7 th\u1ed1ng. Ch\u00fang l\u00e0m r\u1ed1i s\u01a1 \u0111\u1ed3 v\u00e0 che gi\u1ea5u gi\u00e1 tr\u1ecb kinh doanh th\u1ef1c s\u1ef1.<\/p>\n<h3>Quy t\u1eafc V\u00e0ng<\/h3>\n<p>M\u1ed7i use case n\u00ean \u0111\u1ea1i di\u1ec7n cho m\u1ed9t \u0111\u01a1n v\u1ecb gi\u00e1 tr\u1ecb ri\u00eang bi\u1ec7t, cung c\u1ea5p k\u1ebft qu\u1ea3 ho\u00e0n ch\u1ec9nh cho m\u1ed9t t\u00e1c nh\u00e2n. N\u00f3 n\u00ean l\u00e0 c\u1ee5m t\u1eeb \u0111\u1ed9ng t\u1eeb-danh t\u1eeb m\u00f4 t\u1ea3 m\u1ed9t m\u1ee5c ti\u00eau. V\u00ed d\u1ee5, \u201c\u0110\u1eb7t h\u00e0ng\u201d l\u00e0 m\u1ed9t m\u1ee5c ti\u00eau. \u201cNh\u1eadp chi ti\u1ebft \u0111\u01a1n h\u00e0ng\u201d l\u00e0 m\u1ed9t b\u01b0\u1edbc trong m\u1ee5c ti\u00eau \u0111\u00f3.<\/p>\n<h2>\ud83c\udff7\ufe0f Sai l\u1ea7m 5: Quy t\u1eafc \u0111\u1eb7t t\u00ean k\u00e9m<\/h2>\n<p>T\u00ean l\u00e0 c\u00e1ch ch\u00ednh \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t \u00fd ngh\u0129a trong s\u01a1 \u0111\u1ed3. N\u1ebfu t\u00ean kh\u00f4ng nh\u1ea5t qu\u00e1n ho\u1eb7c m\u01a1 h\u1ed3, s\u01a1 \u0111\u1ed3 s\u1ebd kh\u00f4ng th\u1ec3 ph\u1ee5c v\u1ee5 nh\u01b0 t\u00e0i li\u1ec7u. Tr\u00e1nh d\u00f9ng thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt ho\u1eb7c thu\u1eadt ng\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u1ed9i b\u1ed9.<\/p>\n<ul>\n<li><strong>X\u1ea5u:<\/strong> \u201cG\u1eedi bi\u1ec3u m\u1eabu\u201d (Bi\u1ec3u m\u1eabu n\u00e0o? V\u00ec sao?)<\/li>\n<li><strong>T\u1ed1t:<\/strong> \u201c\u0110\u0103ng k\u00fd t\u00e0i kho\u1ea3n\u201d (M\u1ee5c ti\u00eau r\u00f5 r\u00e0ng)<\/li>\n<\/ul>\n<p>S\u1eed d\u1ee5ng c\u1ea5u tr\u00fac \u0111\u1ed9ng t\u1eeb-danh t\u1eeb m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n. \u0110\u1ed9ng t\u1eeb ch\u1ec9 h\u00e0nh \u0111\u1ed9ng, danh t\u1eeb ch\u1ec9 \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y gi\u00fap s\u01a1 \u0111\u1ed3 d\u1ec5 \u0111\u1ecdc \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean k\u1ef9 thu\u1eadt.<\/p>\n<h2>\ud83c\udfa8 Sai l\u1ea7m 6: R\u1ed1i m\u1eaft v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c v\u00e0 k\u1ebft n\u1ed1i qu\u00e1 m\u1ee9c<\/h2>\n<p>M\u1ed9t s\u01a1 \u0111\u1ed3 c\u00f3 qu\u00e1 nhi\u1ec1u \u0111\u01b0\u1eddng ch\u00e9o nhau s\u1ebd kh\u00f3 \u0111\u1ecdc. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng x\u1ea3y ra khi c\u1ed1 g\u1eafng hi\u1ec3n th\u1ecb m\u1ecdi t\u01b0\u01a1ng t\u00e1c c\u00f3 th\u1ec3 trong m\u1ed9t c\u00e1i nh\u00ecn duy nh\u1ea5t. D\u00f9 t\u00ednh \u0111\u1ea7y \u0111\u1ee7 l\u00e0 t\u1ed1t, nh\u01b0ng t\u00ednh d\u1ec5 \u0111\u1ecdc l\u00e0 thi\u1ebft y\u1ebfu.<\/p>\n<p>N\u1ebfu s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean qu\u00e1 d\u00e0y \u0111\u1eb7c, h\u00e3y c\u00e2n nh\u1eafc chia nh\u1ecf th\u00e0nh c\u00e1c h\u1ec7 th\u1ed1ng con ho\u1eb7c d\u00f9ng k\u1ebf th\u1eeba \u0111\u1ec3 nh\u00f3m c\u00e1c t\u00e1c nh\u00e2n t\u01b0\u01a1ng t\u1ef1. \u0110\u1eebng \u00e9p t\u1ea5t c\u1ea3 c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0o m\u1ed9t khung. M\u1ed9t s\u01a1 \u0111\u1ed3 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp, kh\u00f4ng ph\u1ea3i b\u1ea3n sao c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n<h2>\ud83d\udcca T\u00f3m t\u1eaft c\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn<\/h2>\n<table border=\"1\" cellpadding=\"10\" cellspacing=\"0\" style=\"width: 100%; border-collapse: collapse;\">\n<tr style=\"background-color: #f2f2f2;\">\n<th><strong>Sai l\u1ea7m<\/strong><\/th>\n<th><strong>T\u1ea1i sao n\u00f3 th\u1ea5t b\u1ea1i<\/strong><\/th>\n<th><strong>Chi\u1ebfn l\u01b0\u1ee3c s\u1eeda ch\u1eefa<\/strong><\/th>\n<\/tr>\n<tr>\n<td>M\u00f4 h\u00ecnh h\u00f3a con ng\u01b0\u1eddi thay v\u00ec vai tr\u00f2<\/td>\n<td>S\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean l\u1ed7i th\u1eddi khi nh\u00e2n s\u1ef1 thay \u0111\u1ed5i<\/td>\n<td>X\u00e1c \u0111\u1ecbnh ng\u01b0\u1eddi tham gia d\u1ef1a tr\u00ean ch\u1ee9c n\u0103ng c\u00f4ng vi\u1ec7c ho\u1eb7c giao di\u1ec7n h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ea3o ng\u01b0\u1ee3c Include v\u00e0 Extend<\/td>\n<td>Lu\u1ed3ng logic tr\u1edf n\u00ean kh\u00f4ng h\u1ee3p l\u1ec7 ho\u1eb7c g\u00e2y nh\u1ea7m l\u1eabn<\/td>\n<td>S\u1eed d\u1ee5ng Include cho b\u1eaft bu\u1ed9c, Extend cho t\u00f9y ch\u1ecdn<\/td>\n<\/tr>\n<tr>\n<td>Bi\u00ean gi\u1edbi h\u1ec7 th\u1ed1ng m\u1eadp m\u1edd<\/td>\n<td>Ph\u1ea1m vi kh\u00f4ng r\u00f5 r\u00e0ng v\u1edbi c\u00e1c b\u00ean li\u00ean quan<\/td>\n<td>V\u1ebd m\u1ed9t h\u1ed9p r\u00f5 r\u00e0ng v\u00e0 gi\u1eef c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i b\u00ean ngo\u00e0i h\u1ed9p<\/td>\n<\/tr>\n<tr>\n<td>Tr\u1ed9n l\u1eabn c\u00e1c m\u1ee9c \u0111\u1ed9 chi ti\u1ebft<\/td>\n<td>S\u01a1 \u0111\u1ed3 kh\u00f3 \u0111\u1ecdc v\u00e0 kh\u00f4ng nh\u1ea5t qu\u00e1n<\/td>\n<td>\u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111\u1ea1i di\u1ec7n cho m\u1ee5c ti\u00eau \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1eb7t t\u00ean k\u1ef9 thu\u1eadt<\/td>\n<td>C\u00e1c b\u00ean li\u00ean quan kinh doanh kh\u00f4ng th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c<\/td>\n<td>S\u1eed d\u1ee5ng c\u00e1c c\u1ee5m t\u1eeb \u0111\u1ed9ng t\u1eeb-danh t\u1eeb b\u1eb1ng ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean<\/td>\n<\/tr>\n<tr>\n<td>Qu\u00e1 nhi\u1ec1u \u0111\u01b0\u1eddng n\u1ed1i<\/td>\n<td>Ti\u1ebfng \u1ed3n th\u1ecb gi\u00e1c che khu\u1ea5t c\u00e1c m\u1ed1i quan h\u1ec7 quan tr\u1ecdng<\/td>\n<td>S\u1eed d\u1ee5ng g\u00f3i ho\u1eb7c s\u01a1 \u0111\u1ed3 con \u0111\u1ec3 nh\u00f3m ph\u1ee9c t\u1ea1p<\/td>\n<\/tr>\n<\/table>\n<h2>\ud83d\udee1\ufe0f C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho m\u00f4 h\u00ecnh h\u00f3a s\u1ea1ch<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n v\u1eabn hi\u1ec7u qu\u1ea3 trong su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n, h\u00e3y tu\u00e2n theo nh\u1eefng nguy\u00ean t\u1eafc n\u1ec1n t\u1ea3ng n\u00e0y.<\/p>\n<ul>\n<li><strong>B\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ee5c ti\u00eau:<\/strong>H\u1ecfi: &#8216;Ng\u01b0\u1eddi d\u00f9ng mu\u1ed1n \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u g\u00ec?&#8217; tr\u01b0\u1edbc khi v\u1ebd b\u1ea5t k\u1ef3 h\u1ed9p n\u00e0o.<\/li>\n<li><strong>X\u00e1c minh v\u1edbi c\u00e1c b\u00ean li\u00ean quan:<\/strong>\u0110i qua s\u01a1 \u0111\u1ed3 c\u00f9ng ng\u01b0\u1eddi d\u00f9ng kinh doanh. N\u1ebfu h\u1ecd kh\u00f4ng nh\u1eadn ra quy tr\u00ecnh l\u00e0m vi\u1ec7c c\u1ee7a m\u00ecnh, m\u00f4 h\u00ecnh l\u00e0 sai l\u1ec7ch.<\/li>\n<li><strong>L\u1eb7p l\u1ea1i:<\/strong>S\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00f4ng ph\u1ea3i l\u00e0 t\u0129nh. C\u1eadp nh\u1eadt ch\u00fang khi y\u00eau c\u1ea7u thay \u0111\u1ed5i. \u0110\u1eebng coi s\u01a1 \u0111\u1ed3 l\u00e0 s\u1ea3n ph\u1ea9m giao n\u1ed9p m\u1ed9t l\u1ea7n.<\/li>\n<li><strong>Gi\u1eef \u0111\u01a1n gi\u1ea3n:<\/strong> N\u1ebfu m\u1ed9t s\u01a1 \u0111\u1ed3 v\u01b0\u1ee3t qu\u00e1 m\u1ed9t trang, h\u00e3y c\u00e2n nh\u1eafc chia nh\u1ecf n\u00f3. C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p th\u01b0\u1eddng y\u00eau c\u1ea7u nhi\u1ec1u s\u01a1 \u0111\u1ed3 kh\u00e1c nhau cho c\u00e1c m\u00f4-\u0111un kh\u00e1c nhau.<\/li>\n<li><strong>T\u1eadp trung v\u00e0o gi\u00e1 tr\u1ecb:<\/strong> M\u1ed7i tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ea3i mang l\u1ea1i gi\u00e1 tr\u1ecb cho ng\u01b0\u1eddi d\u00f9ng. N\u1ebfu m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00f4ng mang l\u1ea1i k\u1ebft qu\u1ea3, h\u00e3y \u0111\u1eb7t c\u00e2u h\u1ecfi v\u1ec1 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<h2>\ud83d\udd04 Chu k\u1ef3 s\u1ed1ng c\u1ee7a m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/h2>\n<p>Hi\u1ec3u r\u00f5 chu k\u1ef3 s\u1ed1ng gi\u00fap x\u00e1c \u0111\u1ecbnh n\u01a1i sai s\u00f3t th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n. Quy tr\u00ecnh di chuy\u1ec3n t\u1eeb kh\u00e1i ni\u1ec7m h\u00f3a \u0111\u1ebfn m\u00f4 t\u1ea3 chi ti\u1ebft.<\/p>\n<h3>1. X\u00e1c \u0111\u1ecbnh<\/h3>\n<p>Thu th\u1eadp y\u00eau c\u1ea7u. X\u00e1c \u0111\u1ecbnh ai t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng v\u00e0 h\u1ecd l\u00e0m g\u00ec. \u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n d\u1eef li\u1ec7u th\u00f4.<\/p>\n<h3>2. M\u00f4 h\u00ecnh h\u00f3a<\/h3>\n<p>Chuy\u1ec3n d\u1eef li\u1ec7u th\u00f4 th\u00e0nh k\u00fd hi\u1ec7u UML. X\u00e1c \u0111\u1ecbnh c\u00e1c t\u00e1c nh\u00e2n, bi\u00ean gi\u1edbi h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7. \u0110\u00e2y l\u00e0 n\u01a1i sai s\u00f3t \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn \u1edf tr\u00ean th\u01b0\u1eddng x\u1ea3y ra.<\/p>\n<h3>3. X\u00e1c minh<\/h3>\n<p>Xem x\u00e9t l\u1ea1i m\u00f4 h\u00ecnh. Ki\u1ec3m tra t\u00ednh nh\u1ea5t qu\u00e1n. \u0110\u1ea3m b\u1ea3o logic v\u1eabn h\u1ee3p l\u00fd trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. C\u00f3 \u0111i\u1ec3m ch\u1ebft kh\u00f4ng? C\u00f3 \u0111\u01b0\u1eddng \u0111i b\u1ecb thi\u1ebfu kh\u00f4ng?<\/p>\n<h3>4. Tri\u1ec3n khai<\/h3>\n<p>C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ec3 hi\u1ec3u y\u00eau c\u1ea7u. N\u1ebfu s\u01a1 \u0111\u1ed3 m\u01a1 h\u1ed3, m\u00e3 ngu\u1ed3n c\u00f3 th\u1ec3 s\u1ebd sai. S\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng gi\u00fap gi\u1ea3m l\u1ed7i ph\u00e1t tri\u1ec3n.<\/p>\n<h2>\ud83e\udde9 X\u1eed l\u00fd c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p<\/h2>\n<p>Khi x\u1eed l\u00fd c\u00e1c h\u1ec7 th\u1ed1ng doanh nghi\u1ec7p l\u1edbn, m\u1ed9t s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng duy nh\u1ea5t hi\u1ebfm khi \u0111\u1ee7. \u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 l\u00e0m cho ng\u01b0\u1eddi xem c\u1ea3m th\u1ea5y qu\u00e1 t\u1ea3i. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, vi\u1ec7c nh\u00f3m l\u00e0 thi\u1ebft y\u1ebfu.<\/p>\n<p>S\u1eed d\u1ee5ng g\u00f3i \u0111\u1ec3 nh\u00f3m c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng theo l\u0129nh v\u1ef1c kinh doanh. V\u00ed d\u1ee5: m\u1ed9t g\u00f3i \u201cThanh to\u00e1n\u201d v\u00e0 m\u1ed9t g\u00f3i \u201cKho h\u00e0ng\u201d. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p b\u1ea1n hi\u1ec3n th\u1ecb t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao m\u00e0 kh\u00f4ng l\u00e0m ch\u00ecm ng\u01b0\u1eddi xem trong chi ti\u1ebft. B\u1ea1n v\u1eabn c\u00f3 th\u1ec3 duy tr\u00ec m\u1ed9t s\u01a1 \u0111\u1ed3 ch\u00ednh k\u1ebft n\u1ed1i v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 con chi ti\u1ebft.<\/p>\n<p>H\u01a1n n\u1eefa, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng kh\u00e1i qu\u00e1t h\u00f3a. N\u1ebfu b\u1ea1n c\u00f3 nhi\u1ec1u t\u00e1c nh\u00e2n th\u1ef1c hi\u1ec7n c\u00e1c nhi\u1ec7m v\u1ee5 t\u01b0\u01a1ng t\u1ef1, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cQu\u1ea3n tr\u1ecb vi\u00ean\u201d v\u00e0 \u201cGi\u00e1m \u0111\u1ed1c\u201d, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t t\u00e1c nh\u00e2n cha \u201cNg\u01b0\u1eddi qu\u1ea3n tr\u1ecb\u201d v\u00e0 k\u1ebf th\u1eeba c\u00e1c m\u1ed1i quan h\u1ec7. \u0110i\u1ec1u n\u00e0y gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 l\u00e0m r\u00f5 r\u1eb1ng c\u00e1c vai tr\u00f2 n\u00e0y chia s\u1ebb c\u00e1c kh\u1ea3 n\u0103ng c\u1ed1t l\u00f5i.<\/p>\n<h2>\u26a0\ufe0f \u0110i\u1ec1u g\u00ec x\u1ea3y ra khi b\u1ea1n b\u1ecf qua nh\u1eefng sai s\u00f3t n\u00e0y?<\/h2>\n<p>B\u1ecf qua c\u00e1c l\u1ed7i m\u00f4 h\u00ecnh h\u00f3a c\u00f3 h\u1eadu qu\u1ea3 th\u1ef1c t\u1ebf. Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t b\u1ee9c tranh \u0111\u1eb9p. S\u01a1 \u0111\u1ed3 l\u00e0 \u0111\u1ed9ng l\u1ef1c th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n.<\/p>\n<ul>\n<li><strong>S\u1eeda ch\u1eefa l\u1ea1i:<\/strong>C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n x\u00e2y d\u1ef1ng c\u00e1c t\u00ednh n\u0103ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u v\u00ec tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng b\u1ecb m\u01a1 h\u1ed3.<\/li>\n<li><strong>Y\u00eau c\u1ea7u b\u1ecb b\u1ecf s\u00f3t:<\/strong>N\u1ebfu m\u1ed9t m\u1ed1i quan h\u1ec7 b\u1ecb b\u1ecf s\u00f3t, m\u1ed9t t\u00ednh n\u0103ng c\u00f3 th\u1ec3 b\u1ecb qu\u00ean ho\u00e0n to\u00e0n.<\/li>\n<li><strong>S\u1ef1 s\u1ee5p \u0111\u1ed5 trong giao ti\u1ebfp:<\/strong>N\u1ebfu c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng hi\u1ec3u s\u01a1 \u0111\u1ed3, h\u1ecd kh\u00f4ng th\u1ec3 ph\u00ea duy\u1ec7t y\u00eau c\u1ea7u.<\/li>\n<li><strong>Chi ph\u00ed b\u1ea3o tr\u00ec:<\/strong>M\u1ed9t s\u01a1 \u0111\u1ed3 l\u1ed9n x\u1ed9n r\u1ea5t kh\u00f3 c\u1eadp nh\u1eadt. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u01b0\u01a1ng lai s\u1ebd ng\u1ea7n ng\u1ea1i thay \u0111\u1ed5i m\u00e3 ngu\u1ed3n n\u1ebfu t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf kh\u00f4ng r\u00f5 r\u00e0ng.<\/li>\n<\/ul>\n<h2>\ud83d\udcdd Danh s\u00e1ch ki\u1ec3m tra cu\u1ed1i c\u00f9ng \u0111\u1ec3 xem x\u00e9t<\/h2>\n<p>Tr\u01b0\u1edbc khi ho\u00e0n t\u1ea5t s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n, h\u00e3y \u0111i qua danh s\u00e1ch ki\u1ec3m tra n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<ul>\n<li><strong>Ki\u1ec3m tra t\u00e1c nh\u00e2n:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c t\u00e1c nh\u00e2n c\u00f3 n\u1eb1m b\u00ean ngo\u00e0i ranh gi\u1edbi h\u1ec7 th\u1ed1ng kh\u00f4ng?<\/li>\n<li><strong>Ki\u1ec3m tra m\u1ee5c ti\u00eau:<\/strong>M\u1ed7i tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3 cho m\u1ed9t t\u00e1c nh\u00e2n kh\u00f4ng?<\/li>\n<li><strong>Ki\u1ec3m tra m\u1ed1i quan h\u1ec7:<\/strong>C\u00e1c m\u1ed1i quan h\u1ec7 \u00abinclude\u00bb v\u00e0 \u00abextend\u00bb c\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch kh\u00f4ng?<\/li>\n<li><strong>Ki\u1ec3m tra t\u00ean g\u1ecdi:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c t\u00ean g\u1ecdi c\u00f3 r\u00f5 r\u00e0ng, ng\u1eafn g\u1ecdn v\u00e0 nh\u1ea5t qu\u00e1n kh\u00f4ng?<\/li>\n<li><strong>Ki\u1ec3m tra ranh gi\u1edbi:<\/strong>Ranh gi\u1edbi h\u1ec7 th\u1ed1ng c\u00f3 \u0111\u01b0\u1ee3c v\u1ebd r\u00f5 r\u00e0ng kh\u00f4ng?<\/li>\n<li><strong>Ki\u1ec3m tra \u0111\u1ed9 d\u1ec5 \u0111\u1ecdc:<\/strong>S\u01a1 \u0111\u1ed3 c\u00f3 d\u1ec5 theo d\u00f5i m\u00e0 kh\u00f4ng c\u00f3 qu\u00e1 nhi\u1ec1u \u0111\u01b0\u1eddng ch\u00e9o nhau kh\u00f4ng?<\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y, b\u1ea1n \u0111\u1ea3m b\u1ea3o r\u1eb1ng s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee7a b\u1ea1n th\u1ef1c hi\u1ec7n \u0111\u00fang m\u1ee5c \u0111\u00edch th\u1eadt s\u1ef1 c\u1ee7a ch\u00fang: giao ti\u1ebfp r\u00f5 r\u00e0ng v\u00e0 \u0111\u1ecbnh ngh\u0129a y\u00eau c\u1ea7u ch\u00ednh x\u00e1c. S\u1ef1 ch\u00fa \u00fd \u0111\u1ebfn chi ti\u1ebft n\u00e0y s\u1ebd ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 ngu\u1ed3n l\u1ef1c trong d\u00e0i h\u1ea1n. T\u1eadp trung v\u00e0o \u0111\u1ed9 ch\u00ednh x\u00e1c h\u01a1n t\u1ed1c \u0111\u1ed9, v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n s\u1ebd ph\u1ea3n \u00e1nh n\u1ed7 l\u1ef1c \u0111\u00f3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng UML l\u00e0 b\u01b0\u1edbc n\u1ec1n t\u1ea3ng trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m. N\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u1ea7u n\u1ed1i gi\u1eefa y\u00eau&hellip;<\/p>\n","protected":false},"author":1,"featured_media":506,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c (H\u01b0\u1edbng d\u1eabn UML) \ud83d\udcca","_yoast_wpseo_metadesc":"Tr\u00e1nh nh\u1eefng sai l\u1ea7m trong m\u00f4 h\u00ecnh h\u00f3a UML. H\u1ecdc c\u00e1ch nh\u1eadn di\u1ec7n nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng, l\u1ed7i t\u00e1c nh\u00e2n v\u00e0 c\u00e1c quy t\u1eafc m\u1ed1i quan h\u1ec7 \u0111\u1ec3 c\u1ea3i thi\u1ec7n ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng.","inline_featured_image":false,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[44],"tags":[49,50],"class_list":["post-505","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","tag-academic","tag-uml"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c (H\u01b0\u1edbng d\u1eabn UML) \ud83d\udcca<\/title>\n<meta name=\"description\" content=\"Tr\u00e1nh nh\u1eefng sai l\u1ea7m trong m\u00f4 h\u00ecnh h\u00f3a UML. 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