{"id":6155,"date":"2022-01-26T01:52:47","date_gmt":"2022-01-26T01:52:47","guid":{"rendered":"https:\/\/www.cybermedian.com\/cn\/?p=6155"},"modified":"2026-04-20T09:13:11","modified_gmt":"2026-04-20T09:13:11","slug":"%e7%b3%bb%e7%bb%9f%e4%b8%8a%e4%b8%8b%e6%96%87%e5%9b%be%e5%92%8cdfd%e6%9c%89%e4%bb%80%e4%b9%88%e5%85%b3%e7%b3%bb%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/cn\/what-is-the-relationship-between-system-context-diagram-and-dfd\/","title":{"rendered":"\u7cfb\u7edf\u4e0a\u4e0b\u6587\u56fe\u548cDFD\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f"},"content":{"rendered":"<section class=\"section section--body section--first\">\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<p id=\"d84e\" class=\"graf graf--p graf-after--h3\">\u7cfb\u7edf\u00a0<a class=\"markup--anchor markup--p-anchor\" href=\"https:\/\/online.visual-paradigm.com\/knowledge\/system-context-diagram\/what-is-system-context-diagram\/\" 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graf-after--h3\">\u7cfb\u7edf\u4e0a\u4e0b\u6587\u56fe\u7684\u76ee\u6807\u662f\u5c06\u6ce8\u610f\u529b\u96c6\u4e2d\u5728\u5f00\u53d1\u4e00\u7ec4\u7cfb\u7edf\u8981\u6c42\u548c\u7ea6\u675f\u65f6\u5e94\u8003\u8651\u7684\u5916\u90e8\u56e0\u7d20\u548c\u4e8b\u4ef6\u3002\u7cfb\u7edf\u4e0a\u4e0b\u6587\u56fe\u901a\u5e38\u5728\u9879\u76ee\u65e9\u671f\u7528\u4e8e\u786e\u5b9a\u8c03\u67e5\u8303\u56f4\u3002<\/p>\n<p id=\"4acb\" class=\"graf graf--p graf-after--p\">\u7cfb\u7edf\u4e0a\u4e0b\u6587\u56fe\u8868\u793a\u53ef\u80fd\u4e0e\u7cfb\u7edf\u4ea4\u4e92\u7684\u6240\u6709\u5916\u90e8\u5b9e\u4f53\u3002\u6574\u4e2a\u8f6f\u4ef6\u7cfb\u7edf\u770b\u8d77\u6765\u50cf\u4e00\u4e2a\u5355\u4e00\u7684\u8fdb\u7a0b\u3002\u8fd9\u6837\u7684\u56fe\u63cf\u7ed8\u4e86\u4e00\u4e2a\u4f4d\u4e8e\u4e2d\u5fc3\u7684\u7cfb\u7edf\uff0c\u6ca1\u6709\u5176\u5185\u90e8\u7ed3\u6784\u7684\u7ec6\u8282\uff0c\u88ab\u73af\u5883\u4e2d\u7684\u6240\u6709\u5916\u90e8\u5b9e\u4f53\u548c\u4ea4\u4e92\u7cfb\u7edf\u5305\u56f4\u3002<\/p>\n<h4 id=\"787f\" class=\"graf graf--h4 graf-after--p\"><span id=\"What_is_Top-Down_Decomposition\">\u4ec0\u4e48\u662f\u81ea\u9876\u5411\u4e0b\u5206\u89e3\uff1f<\/span><\/h4>\n<p id=\"8d22\" class=\"graf graf--p graf-after--h4\">\u5728\u81ea\u4e0a\u800c\u4e0b\u7684\u8bbe\u8ba1\u4e2d\uff0c\u8bbe\u8ba1\u4e86\u7cfb\u7edf\u7684\u6982\u8ff0\uff0c\u6307\u5b9a\u4f46\u4e0d\u8be6\u7ec6\u8bf4\u660e\u4efb\u4f55\u7ea7\u522b\u7684\u5b50\u7cfb\u7edf\u3002\u7136\u540e\uff0c\u5bf9\u6bcf\u4e2a\u5b50\u7cfb\u7edf\u8fdb\u884c\u66f4\u8be6\u7ec6\u7684\u7ec6\u5316\uff0c\u4f8b\u5982\uff0c\u6709\u65f6\u5c06\u5176\u5212\u5206\u4e3a\u8bb8\u591a\u4e0d\u540c\u7684\u5b50\u7cfb\u7edf\u7ea7\u522b\uff0c\u4ece\u800c\u5c06\u6574\u4e2a\u89c4\u8303\u5206\u89e3\u4e3a\u57fa\u672c\u5143\u7d20\u3002<\/p>\n<p id=\"066a\" class=\"graf graf--p graf-after--p\">\u81ea\u9876\u5411\u4e0b\u8bbe\u8ba1\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5c06\u7cfb\u7edf\u5206\u89e3\u4e3a\u66f4\u5c0f\u7684\u90e8\u5206\uff0c\u4ee5\u4fbf\u4e86\u89e3\u5176\u5b50\u7cfb\u7edf\u3002\u4e00\u65e6\u786e\u5b9a\u4e86\u8fd9\u4e9b\u57fa\u672c\u5143\u7d20\uff0c\u5b83\u4eec\u5c31\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u6784\u5efa\u5230\u8ba1\u7b97\u673a\u6a21\u5757\u4e2d\u3002\u6784\u5efa\u6a21\u5757\u540e\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u5b83\u4eec\u7ec4\u5408\u5728\u4e00\u8d77\u5e76\u4ece\u8fd9\u4e9b\u5355\u72ec\u7684\u5143\u7d20\u6784\u5efa\u6574\u4e2a\u7cfb\u7edf\u3002<\/p>\n<h3 id=\"f120\" class=\"graf graf--h3 graf-after--p\"><span id=\"Top-Level_Context-Level_Diagram\">\u9876\u5c42\u4e0a\u4e0b\u6587\u7ea7\u56fe<\/span><\/h3>\n<p id=\"9343\" class=\"graf graf--p graf-after--h3\">\u4e0a\u4e0b\u6587\u56fe\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6982\u8ff0\uff0c\u5b83\u662f\u6570\u636e\u6d41\u56fe\u4e2d\u7684\u6700\u9ad8\u7ea7\u522b\uff0c\u4ec5\u5305\u542b\u4e00\u4e2a\u4ee3\u8868\u6574\u4e2a\u7cfb\u7edf\u7684\u8fdb\u7a0b\u3002\u5e94\u8be5\u5c06\u5176\u62c6\u5206\u4e3a\u63d0\u4f9b\u66f4\u591a\u7ec6\u8282\u7684\u4e3b\u8981\u6d41\u7a0b\uff0c\u5e76\u4e14\u6bcf\u4e2a\u4e3b\u8981\u6d41\u7a0b\u53ef\u4ee5\u8fdb\u4e00\u6b65\u62c6\u5206\u4ee5\u63d0\u4f9b\u66f4\u591a\u7ec6\u8282\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"31a6\" class=\"graf graf--li graf-after--p\">\u6240\u6709\u5916\u90e8\u5b9e\u4f53\u4ee5\u53ca\u8fdb\u51fa\u5b83\u4eec\u7684\u4e3b\u8981\u6570\u636e\u6d41\u90fd\u663e\u793a\u5728\u4e0a\u4e0b\u6587\u56fe\u4e0a\u3002<\/li>\n<li id=\"2823\" class=\"graf graf--li graf-after--li\">\u8be5\u56fe\u4e0d\u5305\u542b\u4efb\u4f55\u6570\u636e\u5b58\u50a8\u3002<\/li>\n<li id=\"06ed\" class=\"graf graf--li graf-after--li\">\u4e0a\u4e0b\u6587\u7ea7\u56fe\u4e2d\u7684\u5355\u4e2a\u8fdb\u7a0b\uff0c\u4ee3\u8868\u6574\u4e2a\u7cfb\u7edf\uff0c\u53ef\u4ee5\u5206\u89e3\u4e3a\u5c06\u7cfb\u7edf\u7684\u4e3b\u8981\u8fdb\u7a0b\u5305\u542b\u5728\u4e0b\u4e00\u7ea7\u56fe\u4e2d\uff0c\u79f0\u4e3a\u56fe 0\u3002<\/li>\n<\/ul>\n<figure id=\"ae36\" class=\"graf graf--figure graf-after--li\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/cn\/wp-content\/uploads\/sites\/6\/2022\/01\/0UUy6B-hUvPU0IwS5.png\" data-image-id=\"0*UUy6B-hUvPU0IwS5.png\" data-width=\"478\" data-height=\"245\" \/><\/figure>\n<h3 id=\"f581\" class=\"graf graf--h3 graf-after--figure\"><span id=\"Level_1_DFD\">1\u7ea7DFD<\/span><\/h3>\n<p id=\"1211\" class=\"graf graf--p graf-after--h3\">\u56fe 0 \u4e2d\u7684\u6d41\u7a0b\uff08\u5e26\u6709\u6574\u6570\uff09\u53ef\u4ee5\u8fdb\u4e00\u6b65\u5c55\u5f00\u4ee5\u8868\u793a\u5904\u7406\u6d3b\u52a8\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u663e\u793a\u4e86\u6d41\u7a0b\u7206\u70b8\u7684\u4e0b\u4e00\u4e2a\u7ea7\u522b\uff08\uff08\u56fe 1\uff09\u3002<\/p>\n<p id=\"de98\" class=\"graf graf--p graf-after--p\">\u6ce8\u610f\uff1a<\/p>\n<p id=\"29f2\" class=\"graf graf--p graf-after--p\">\u867d\u7136\u4e0b\u9762\u7684level 1 DFD\u53ea\u6709\u4e09\u4e2a\u6d41\u7a0b\uff0c\u4f46\u662f\u4ece\u6d41\u7a0b\u5230\u5916\u90e8\u5b9e\u4f53\u7684\u8f93\u5165\u548c\u8f93\u5165\u76f8\u5f53\u591a\uff0c\u6700\u7ec8\u53ef\u80fd\u5728\u56fe\u4e2d\u51fa\u73b0\u51e0\u6761\u4ea4\u53c9\u7ebf\uff1b\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u5728 DFD \u4e2d\u4f7f\u7528\uff08\u4e3b\u89c6\u56fe\u548c\u8f85\u52a9\u89c6\u56fe\uff09\u540c\u4e00\u5916\u90e8\u5b9e\u4f53\u7684\u591a\u4e2a\u89c6\u56fe\u3002<\/p>\n<figure id=\"43eb\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/cn\/wp-content\/uploads\/sites\/6\/2022\/01\/0T29bIDs3UALgHp9a.png\" data-image-id=\"0*T29bIDs3UALgHp9a.png\" data-width=\"715\" data-height=\"655\" \/><\/figure>\n<h3 id=\"3db1\" class=\"graf graf--h3 graf-after--figure\"><span id=\"Level_2_DFD\">2\u7ea7DFD<\/span><\/h3>\n<p id=\"8e78\" class=\"graf graf--p graf-after--h3\">\u5982\u679c\u4e00\u4e2a\u6d41\u7a0b\u5728\u51e0\u4e2a\u5916\u90e8\u5b9e\u4f53\u4e4b\u95f4\u6709\u5927\u91cf\u6570\u636e\u6d41\u94fe\u63a5\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u5c06\u8be5\u7279\u5b9a\u6d41\u7a0b\u548c\u5173\u8054\u7684\u5916\u90e8\u5b9e\u4f53\u63d0\u53d6\u5230\u4e00\u4e2a\u7c7b\u4f3c\u4e8e\u4e0a\u4e0b\u6587\u56fe\u7684\u5355\u72ec\u56fe\u8868\u4e2d\uff0c\u7136\u540e\u518d\u5c06\u6d41\u7a0b\u7ec6\u5316\u4e3a\u5355\u72ec\u7684 DFD \u7ea7\u522b\uff1b\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u60a8\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u786e\u4fdd\u5b83\u4eec\u4e4b\u95f4\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<figure id=\"262c\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/cn\/wp-content\/uploads\/sites\/6\/2022\/01\/0LKmM5RYhHrpTrGLt.png\" data-image-id=\"0*LKmM5RYhHrpTrGLt.png\" data-width=\"794\" data-height=\"690\" \/><\/figure>\n<h4 id=\"d3e4\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Model_Consistency_of_DFD_Between_Levels\">\u5c42\u95f4DFD\u6a21\u578b\u4e00\u81f4\u6027<\/span><\/h4>\n<p id=\"a62a\" class=\"graf graf--p graf-after--h4\">\u5f53\u5bf9 DFD \u6267\u884c\u81ea\u4e0a\u800c\u4e0b\u7684\u5206\u89e3\u5230\u8f83\u4f4e\u7ea7\u522b\u7684 DFD \u65f6\uff0c\u8f93\u5165\u548c\u8f93\u51fa\u5fc5\u987b\u5728 DFD \u7684\u7ea7\u522b\u4e4b\u95f4\u4fdd\u6301\u4e0d\u53d8\u3002\u4f8b\u5982\uff0c\u7ea7\u522b n \u548c n+1 \u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u8f93\u5165\u548c\u8f93\u51fa<\/p>\n<figure id=\"4af0\" class=\"graf graf--figure graf-after--p graf--trailing\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/cn\/wp-content\/uploads\/sites\/6\/2022\/01\/0okOL184fBcmESu1r.png\" data-image-id=\"0*okOL184fBcmESu1r.png\" data-width=\"949\" data-height=\"660\" \/><\/figure>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"section section--body\">\n<div class=\"section-divider\">\n<hr 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