{"id":8449,"date":"2022-01-26T01:52:47","date_gmt":"2022-01-26T01:52:47","guid":{"rendered":"https:\/\/www.cybermedian.com\/ja\/?p=8449"},"modified":"2026-04-20T09:13:11","modified_gmt":"2026-04-20T09:13:11","slug":"%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0%e3%82%b3%e3%83%b3%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88%e5%9b%b3%e3%81%a8dfd%e3%81%ae%e9%96%a2%e4%bf%82%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/ja\/what-is-the-relationship-between-system-context-diagram-and-dfd\/","title":{"rendered":"\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u3068DFD\u306e\u95a2\u4fc2\u306f\u4f55\u3067\u3059\u304b\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\"><a class=\"markup--anchor markup--p-anchor\" href=\"https:\/\/online.visual-paradigm.com\/knowledge\/system-context-diagram\/what-is-system-context-diagram\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/online.visual-paradigm.com\/knowledge\/system-context-diagram\/what-is-system-context-diagram\/\">\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3<\/a>\uff08\u00a0\u30ec\u30d9\u30eb0\u00a0<a class=\"markup--anchor markup--p-anchor\" href=\"https:\/\/www.visual-paradigm.com\/guide\/data-flow-diagram\/what-is-data-flow-diagram\/\" target=\"_blank\" rel=\"noopener\" 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graf-after--p\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u306f\u901a\u5e38\u3001\u8981\u4ef6\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u5229\u5bb3\u95a2\u4fc2\u8005\u304c\u8aad\u3080\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u5229\u5bb3\u95a2\u4fc2\u8005\u304c\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u308f\u304b\u308a\u3084\u3059\u3044\u8a00\u8449\u3067\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p id=\"ae15\" class=\"graf graf--p graf-after--p\">\u6b21\u306b\u3001\u8ca9\u58f2\u6ce8\u6587\u30b7\u30b9\u30c6\u30e0\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"30db\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0mQyZUktURYYDyNCp.png\" data-image-id=\"0*mQyZUktURYYDyNCp.png\" data-width=\"662\" data-height=\"452\" data-is-featured=\"true\" \/><\/figure>\n<p id=\"36b7\" class=\"graf graf--p graf-after--figure\"><a class=\"markup--anchor markup--p-anchor\" href=\"https:\/\/diagrams.visual-paradigm.com\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/6b20da6b-c7ad-4af6-8438-afd909b6d156.xml&amp;name=Sales%20Order%20System\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/diagrams.visual-paradigm.com\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/6b20da6b-c7ad-4af6-8438-afd909b6d156.xml&amp;name=Sales%20Order%20System\">\u3053\u306e\u56f3\u3092\u7de8\u96c6\u3059\u308b<\/a><\/p>\n<h3 id=\"03ad\" class=\"graf graf--h3 graf-after--p\"><span id=\"The_purpose_of_the_system_context_diagram\">\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u306e\u76ee\u7684<\/span><\/h3>\n<p id=\"065e\" class=\"graf graf--p 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src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/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\">\u30ec\u30d9\u30eb2DFD<\/span><\/h3>\n<p id=\"8e78\" class=\"graf graf--p graf-after--h3\">\u5c11\u6570\u306e\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u3067\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u304c\u30ea\u30f3\u30af\u3057\u3066\u3044\u308b\u30d7\u30ed\u30bb\u30b9\u306e\u5834\u5408\u3001\u30d7\u30ed\u30bb\u30b9\u3092\u5225\u306e\u30ec\u30d9\u30eb\u306eDFD\u306b\u7d5e\u308a\u8fbc\u3080\u524d\u306b\u3001\u307e\u305a\u305d\u306e\u7279\u5b9a\u306e\u30d7\u30ed\u30bb\u30b9\u3068\u95a2\u9023\u3059\u308b\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u3068\u540c\u69d8\u306e\u5225\u306e\u56f3\u306b\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u305d\u308c\u3089\u306e\u9593\u306e\u4e00\u8cab\u6027\u3092\u306f\u308b\u304b\u306b\u7c21\u5358\u306b\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n<figure id=\"262c\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/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\">\u30ec\u30d9\u30eb\u9593\u306eDFD\u306e\u30e2\u30c7\u30eb\u306e\u4e00\u8cab\u6027<\/span><\/h4>\n<p id=\"a62a\" class=\"graf graf--p graf-after--h4\">DFD\u304b\u3089\u4e0b\u4f4d\u30ec\u30d9\u30eb\u306eDFD\u3078\u306e\u30c8\u30c3\u30d7\u30c0\u30a6\u30f3\u5206\u89e3\u3092\u5b9f\u884c\u3059\u308b\u5834\u5408\u3001\u5165\u529b\u3068\u51fa\u529b\u306fDFD\u306e\u30ec\u30d9\u30eb\u9593\u3067\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30ec\u30d9\u30ebn\u3068n +1\u306f\u540c\u3058\u5165\u529b\u3068\u51fa\u529b\u3092\u6301\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/p>\n<figure id=\"4af0\" class=\"graf 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graf--li graf-after--figure\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/acd02024-ac0c-4a6b-a049-670cf7c11a9c.xml&amp;name=Profiling%20System%20Context%20Diagram\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/acd02024-ac0c-4a6b-a049-670cf7c11a9c.xml&amp;name=Profiling%20System%20Context%20Diagram\">\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3<\/a><\/li>\n<\/ul>\n<figure id=\"7e9c\" class=\"graf graf--figure graf-after--li\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0ocj47dJjzb9lNmHO.png\" data-image-id=\"0*ocj47dJjzb9lNmHO.png\" data-width=\"1000\" data-height=\"702\" 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src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/07qExNggNX-tqsDpM.png\" data-image-id=\"0*7qExNggNX-tqsDpM.png\" data-width=\"937\" data-height=\"707\" \/><\/figure>\n<ul class=\"postList\">\n<li id=\"64e9\" class=\"graf graf--li graf-after--figure\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/0fbae7cf-d582-4f2b-9206-272b4b4014ca.xml&amp;name=Online%20Shopping%20System%20Context%20Diagram\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/0fbae7cf-d582-4f2b-9206-272b4b4014ca.xml&amp;name=Online%20Shopping%20System%20Context%20Diagram\">\u30aa\u30f3\u30e9\u30a4\u30f3\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3<\/a><\/li>\n<\/ul>\n<figure id=\"45ad\" class=\"graf graf--figure graf-after--li\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0_rX3CkaNVZFSB6d3.png\" data-image-id=\"0*_rX3CkaNVZFSB6d3.png\" data-width=\"750\" data-height=\"580\" \/><\/figure>\n<ul class=\"postList\">\n<li id=\"f2d4\" class=\"graf graf--li graf-after--figure\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SystemContextDiagram&amp;gallery=\/repository\/34b14c69-a7c0-4081-aa4d-b8428c225539.xml&amp;name=Booking%20System%20Context%20Diagram\" target=\"_blank\" rel=\"noopener\" 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