{"id":557,"date":"2026-03-21T16:47:45","date_gmt":"2026-03-21T16:47:45","guid":{"rendered":"https:\/\/www.visualize-ai.com\/tw\/documenting-legacy-systems-study-data-flow-diagrams\/"},"modified":"2026-03-21T16:47:45","modified_gmt":"2026-03-21T16:47:45","slug":"documenting-legacy-systems-study-data-flow-diagrams","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/tw\/documenting-legacy-systems-study-data-flow-diagrams\/","title":{"rendered":"DFD\u6307\u5357\uff1a\u70ba\u7814\u7a76\u800c\u8a18\u9304\u907a\u7559\u7cfb\u7d71"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Child-style infographic illustrating legacy system documentation using Data Flow Diagrams (DFDs), featuring colorful hand-drawn visuals of system boundaries, three-level DFD hierarchy (Context, Level 1, Level 2), data flow arrows, stick-figure stakeholders, database icons, and a documentation checklist for studying and maintaining legacy software systems\" decoding=\"async\" src=\"https:\/\/www.visualize-ai.com\/wp-content\/uploads\/2026\/03\/legacy-system-documentation-dfd-infographic-child-style.jpg\"\/><\/figure>\n<\/div>\n<p>\u907a\u7559\u7cfb\u7d71\u901a\u5e38\u4ee3\u8868\u95dc\u9375\u696d\u52d9\u904b\u4f5c\u7684\u9aa8\u5e79\u3002\u96a8\u8457\u6642\u9593\u63a8\u79fb\uff0c\u4eba\u54e1\u66f4\u8fed\u8207\u9700\u6c42\u6f14\u8b8a\uff0c\u9019\u4e9b\u7cfb\u7d71\u4e2d\u5167\u5d4c\u7684\u539f\u59cb\u908f\u8f2f\u53ef\u80fd\u8b8a\u5f97\u6a21\u7cca\u4e0d\u6e05\u3002\u7406\u89e3\u8cc7\u6599\u5728\u9019\u4e9b\u74b0\u5883\u4e2d\u7684\u6d41\u52d5\u65b9\u5f0f\uff0c\u5c0d\u65bc\u7dad\u8b77\u3001\u9077\u79fb\u8207\u5408\u898f\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6307\u5357\u5c08\u6ce8\u65bc\u56b4\u8b39\u5730\u8a18\u9304\u907a\u7559\u7cfb\u7d71\u4ee5\u4f9b\u7814\u7a76\uff0c\u7279\u5225\u662f\u5229\u7528\u8cc7\u6599\u6d41\u7a0b\u5716\uff08DFD\uff09\u4f5c\u70ba\u4e3b\u8981\u5de5\u5177\u9032\u884c\u8996\u89ba\u5316\u8207\u5206\u6790\u3002\ud83d\udee0\ufe0f<\/p>\n<p>\u5728\u9032\u884c\u6587\u4ef6\u7de8\u88fd\u6642\uff0c\u76ee\u6a19\u662f\u6e05\u6670\u8207\u6e96\u78ba\u3002\u6211\u5011\u5fc5\u9808\u6355\u6349\u7cfb\u7d71\u7576\u4eca\u5be6\u969b\u904b\u4f5c\u7684\u771f\u5be6\u60c5\u6cc1\uff0c\u800c\u975e\u5341\u5e74\u524d\u7684\u8a2d\u8a08\u3002\u6b64\u904e\u7a0b\u9700\u8981\u4e00\u7a2e\u6709\u689d\u4e0d\u7d0a\u7684\u65b9\u6cd5\uff0c\u65e2\u8981\u5c0a\u91cd\u5e95\u5c64\u67b6\u69cb\u7684\u8907\u96dc\u6027\uff0c\u53c8\u8981\u8b93\u7576\u524d\u7684\u5229\u5bb3\u95dc\u4fc2\u4eba\u80fd\u5920\u7406\u89e3\u3002<\/p>\n<h2>\ud83d\udd0d 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\u8cc7\u6599\u6d41\u7a0b\u5716\u5728\u7814\u7a76\u4e2d\u7684\u89d2\u8272<\/h2>\n<p>\u8cc7\u6599\u6d41\u7a0b\u5716\u63d0\u4f9b\u8cc7\u8a0a\u5728\u7cfb\u7d71\u4e2d\u5982\u4f55\u6d41\u52d5\u7684\u8996\u89ba\u5316\u8868\u793a\u3002\u8207\u5c08\u6ce8\u65bc\u63a7\u5236\u908f\u8f2f\u8207\u6c7a\u7b56\u9ede\u7684\u6d41\u7a0b\u5716\u4e0d\u540c\uff0cDFD\u5f37\u8abf\u8cc7\u6599\u7684\u8f49\u63db\u3002\u6b64\u5340\u5225\u5c0d\u907a\u7559\u7cfb\u7d71\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u5546\u696d\u908f\u8f2f\u901a\u5e38\u6df1\u85cf\u65bc\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u800c\u975e\u660e\u78ba\u7684\u5de5\u4f5c\u6d41\u7a0b\u6b65\u9a5f\u3002<\/p>\n<p>DFD\u5728\u7814\u7a76\u820a\u7cfb\u7d71\u6642\u5177\u6709\u591a\u9805\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u62bd\u8c61\u5316\uff1a<\/strong> \u5b83\u5011\u96b1\u85cf\u5be6\u4f5c\u7d30\u7bc0\uff0c\u4f8b\u5982\u7a0b\u5f0f\u8a9e\u8a00\u6216\u8cc7\u6599\u5eab\u7d50\u69cb\uff0c\u5c08\u6ce8\u65bc\u300c\u4ec0\u9ebc\u300d\u800c\u975e\u300c\u5982\u4f55\u300d\u3002<\/li>\n<li><strong> \u6e05\u6670\u5ea6\uff1a<\/strong> \u8996\u89ba\u5316\u8cc7\u6599\u8def\u5f91\u6709\u52a9\u65bc\u8b58\u5225\u74f6\u9838\u8207\u55ae\u4e00\u5931\u6557\u9ede\u3002<\/li>\n<li><strong> \u6e9d\u901a\uff1a<\/strong> \u5b83\u5011\u4f5c\u70ba\u6280\u8853\u4eba\u54e1\u8207\u696d\u52d9\u5206\u6790\u5e2b\u4e4b\u9593\u7684\u4e2d\u7acb\u8a9e\u8a00\u3002<\/li>\n<\/ul>\n<h2>\ud83c\udfd7\ufe0f \u8cc7\u6599\u6d41\u7a0b\u5716\u7684\u5c64\u7d1a<\/h2>\n<p>\u8981\u6709\u6548\u8a18\u9304\u8907\u96dc\u7684\u907a\u7559\u7cfb\u7d71\uff0c\u4e0d\u61c9\u8a66\u5716\u4e00\u6b21\u7e6a\u88fd\u6240\u6709\u5167\u5bb9\u3002\u5c07\u6587\u4ef6\u7de8\u88fd\u5206\u89e3\u70ba\u4e0d\u540c\u5c64\u7d1a\uff0c\u53ef\u63a1\u7528\u81ea\u4e0a\u800c\u4e0b\u7684\u65b9\u6cd5\u3002\u6b64\u65b9\u6cd5\u53ef\u907f\u514d\u8b93\u8b80\u8005\u611f\u5230\u58d3\u529b\uff0c\u4e26\u78ba\u4fdd\u5404\u5c64\u4e4b\u9593\u908f\u8f2f\u4e00\u81f4\u3002<\/p>\n<h3>1. \u4e0a\u4e0b\u6587\u5716\uff08\u7b2c0\u5c64\uff09<\/h3>\n<p>\u4e0a\u4e0b\u6587\u5716\u5c07\u7cfb\u7d71\u8868\u793a\u70ba\u55ae\u4e00\u6d41\u7a0b\u3002\u5b83\u986f\u793a\u7cfb\u7d71\u8207\u5916\u90e8\u5be6\u9ad4\u7684\u95dc\u4fc2\u3002\u6b64\u9ad8\u968e\u8996\u5716\u5c0d\u9700\u8981\u7406\u89e3\u7cfb\u7d71\u8f38\u5165\u8207\u8f38\u51fa\uff0c\u4f46\u53c8\u4e0d\u5e0c\u671b\u9677\u5165\u5167\u90e8\u7d30\u7bc0\u7684\u5229\u5bb3\u95dc\u4fc2\u4eba\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u4e0a\u4e0b\u6587\u5716\u4e2d\u7684\u95dc\u9375\u5143\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4e00\u500b\u4ee3\u8868\u6574\u500b\u7cfb\u7d71\u7684\u4e2d\u592e\u6d41\u7a0b\u3002<\/li>\n<li>\u5305\u570d\u8a72\u6d41\u7a0b\u7684\u5916\u90e8\u5be6\u9ad4\u3002<\/li>\n<li>\u4e3b\u8981\u8cc7\u6599\u6d41\u9032\u5165\u8207\u96e2\u958b\u7cfb\u7d71\u3002<\/li>\n<\/ul>\n<h3>2. \u7b2c1\u5c64\u5716<\/h3>\n<p>\u7b2c1\u5c64\u5716\u5c07\u4e0a\u4e0b\u6587\u5716\u4e2d\u7684\u55ae\u4e00\u6d41\u7a0b\u5206\u89e3\u70ba\u5176\u4e3b\u8981\u5b50\u6d41\u7a0b\u3002\u6b64\u5c64\u63ed\u793a\u7cfb\u7d71\u7684\u4e3b\u8981\u529f\u80fd\u5340\u57df\u3002\u5b83\u986f\u793a\u8cc7\u6599\u5728\u9019\u4e9b\u4e3b\u8981\u5340\u57df\u4e4b\u9593\u5982\u4f55\u6d41\u52d5\uff0c\u4ee5\u53ca\u8cc7\u6599\u5132\u5b58\u7684\u4f4d\u7f6e\u3002<\/p>\n<p>\u5728\u5efa\u7acb\u6b64\u5c64\u6642\uff0c\u8acb\u78ba\u4fdd\u8cc7\u6599\u6d41\u8207\u4e0a\u4e0b\u6587\u5716\u4fdd\u6301\u5e73\u8861\u3002\u4e0a\u4e0b\u6587\u5716\u4e2d\u986f\u793a\u7684\u6bcf\u4e00\u9805\u8f38\u5165\u8207\u8f38\u51fa\uff0c\u90fd\u5fc5\u9808\u51fa\u73fe\u5728\u7b2c1\u5c64\u5716\u4e2d\u3002<\/p>\n<h3>3. \u7b2c2\u5c64\u5716\uff08\u53ca\u66f4\u9ad8\u5c64\u7d1a\uff09<\/h3>\n<p>\u5c0d\u65bc\u7b2c 1 \u7d1a\u5716\u8868\u4e2d\u7684\u8907\u96dc\u6d41\u7a0b\uff0c\u6709\u5fc5\u8981\u9032\u4e00\u6b65\u5206\u89e3\u3002\u7b2c 2 \u7d1a\u5716\u8868\u5c07\u7279\u5b9a\u7684\u5b50\u6d41\u7a0b\u5206\u89e3\u70ba\u5176\u7d44\u6210\u6b65\u9a5f\u3002\u6b64\u7d1a\u5225\u901a\u5e38\u662f\u9032\u884c\u6700\u8a73\u7d30\u7814\u7a76\u7684\u5730\u65b9\uff0c\u7279\u5225\u662f\u5728\u5206\u6790\u7279\u5b9a\u696d\u52d9\u898f\u5247\u6216\u8cc7\u6599\u8f49\u63db\u6642\u3002<\/p>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u8868\u683c\u6bd4\u8f03\u5404\u7d1a\u5225\u7684\u91cd\u9ede\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5716\u8868\u5c64\u7d1a<\/th>\n<th>\u91cd\u9ede<\/th>\n<th>\u4e3b\u8981\u53d7\u773e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e0a\u4e0b\u6587\u5716<\/td>\n<td>\u7cfb\u7d71\u908a\u754c\u8207\u5916\u90e8\u4ecb\u9762<\/td>\n<td>\u9ad8\u968e\u4e3b\u7ba1\u3001\u67b6\u69cb\u5e2b<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c 1 \u7d1a<\/td>\n<td>\u4e3b\u8981\u529f\u80fd\u5340\u57df\u8207\u8cc7\u6599\u5132\u5b58<\/td>\n<td>\u696d\u52d9\u5206\u6790\u5e2b\u3001\u8cc7\u6df1\u958b\u767c\u4eba\u54e1<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c 2 \u7d1a<\/td>\n<td>\u8a73\u7d30\u7684\u6d41\u7a0b\u908f\u8f2f\u8207\u8cc7\u6599\u8f49\u63db<\/td>\n<td>\u958b\u767c\u4eba\u54e1\u3001\u54c1\u8cea\u4fdd\u8b49\u5de5\u7a0b\u5e2b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83e\udde9 \u6536\u96c6\u6e96\u78ba\u5716\u8868\u6240\u9700\u8cc7\u8a0a<\/h2>\n<p>\u7e6a\u88fd\u5716\u8868\u4e0d\u50c5\u50c5\u662f\u7e6a\u5716\u7df4\u7fd2\uff1b\u9019\u662f\u4e00\u9805\u7814\u7a76\u6d3b\u52d5\u3002\u60a8\u5fc5\u9808\u6536\u96c6\u8b49\u64da\u4f86\u652f\u6301\u8996\u89ba\u5316\u5448\u73fe\u3002\u4f9d\u8cf4\u8a18\u61b6\u6216\u904e\u6642\u7684\u624b\u518a\u6703\u5c0e\u81f4\u4e0d\u6e96\u78ba\u7684\u6587\u4ef6\u3002\u4ee5\u4e0b\u65b9\u6cd5\u6709\u52a9\u65bc\u78ba\u4fdd\u8cc7\u6599\u6d41\u88ab\u6b63\u78ba\u6355\u6349\u3002<\/p>\n<h3>1. 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