{"id":8993,"date":"2026-01-10T07:26:19","date_gmt":"2026-01-09T23:26:19","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/ja\/beginners-guide-to-yourdon-demarco-dfd-diagrams\/"},"modified":"2026-01-10T07:26:19","modified_gmt":"2026-01-09T23:26:19","slug":"beginners-guide-to-yourdon-demarco-dfd-diagrams","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/ja\/beginners-guide-to-yourdon-demarco-dfd-diagrams\/","title":{"rendered":"Yourdon DeMarco DFD\u56f3\u306e\u5165\u9580\u30ac\u30a4\u30c9"},"content":{"rendered":"<h2>\u306f\u3058\u3081\u306b<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\uff08DFD\uff09\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30c7\u30fc\u30bf\u306e\u6d41\u308c\u3092\u53ef\u8996\u5316\u3057\u3001\u6587\u66f8\u5316\u3059\u308b\u305f\u3081\u306e\u8cb4\u91cd\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u30a8\u30c9\u30ef\u30fc\u30c9\u30fb\u30e6\u30fc\u30c0\u30f3\u3068\u30c8\u30e0\u30fb\u30c7\u30de\u30fc\u30b3\u306b\u3088\u3063\u3066\u8003\u6848\u3055\u308c\u305fYourdon DeMarco DFD\u306f\u3001\u30c7\u30fc\u30bf\u304c\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u3069\u306e\u3088\u3046\u306b\u79fb\u52d5\u3059\u308b\u304b\u3092\u69cb\u9020\u7684\u306b\u8868\u73fe\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u5165\u9580\u30ac\u30a4\u30c9\u3067\u306f\u3001Yourdon DeMarco DFD\u306e\u6982\u8981\u3092\u7d39\u4ecb\u3057\u3001Visual Paradigm Online\u3092\u6d3b\u7528\u3057\u3066\u3001\u305d\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u8c4a\u5bcc\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u6d3b\u304b\u3057\u3066\u56f3\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h2>Yourdon DeMarco DFD\u56f3\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n<p>Yourdon DeMarco DFD\u56f3\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u304c\u3069\u306e\u3088\u3046\u306b\u51e6\u7406\u3055\u308c\u3001\u8ee2\u9001\u3055\u308c\u308b\u304b\u3092\u30b0\u30e9\u30d5\u30a3\u30ab\u30eb\u306b\u8868\u73fe\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u5206\u6790\u8005\u3001\u8a2d\u8a08\u8005\u3001\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u304c\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u7684\u5074\u9762\u3092\u7406\u89e3\u3059\u308b\u306e\u3092\u52a9\u3051\u3001\u30c7\u30fc\u30bf\u306e\u5143\u3001\u51e6\u7406\u3001\u30c7\u30fc\u30bf\u4fdd\u5b58\u3001\u30c7\u30fc\u30bf\u306e\u76ee\u7684\u5730\u3092\u5f37\u8abf\u3057\u307e\u3059\u3002DFD\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u306e\u521d\u671f\u6bb5\u968e\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u6349\u3048\u3001\u4f1d\u3048\u308b\u305f\u3081\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img alt=\"Yourdon DeMarco DFD Software\" decoding=\"async\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/yourdon-demarco-dfd-software.png\"\/><\/p>\n<h2>Yourdon DeMarco DFD\u56f3\u306e\u69cb\u6210\u8981\u7d20\uff1a<\/h2>\n<ol>\n<li><strong>\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff1a<\/strong>\u3053\u308c\u3089\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u5883\u754c\u5916\u3067\u30b7\u30b9\u30c6\u30e0\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3067\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u3001\u4ed6\u306e\u30b7\u30b9\u30c6\u30e0\u3001\u307e\u305f\u306f\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u3067\u3042\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30d7\u30ed\u30bb\u30b9\uff1a<\/strong>\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u767a\u751f\u3059\u308b\u6d3b\u52d5\u3084\u5909\u63db\u3092\u8868\u3057\u307e\u3059\u3002\u5404\u30d7\u30ed\u30bb\u30b9\u306f\u5165\u529b\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308a\u3001\u3042\u308b\u51e6\u7406\u3092\u5b9f\u884c\u3057\u3001\u51fa\u529b\u30c7\u30fc\u30bf\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\uff1a<\/strong>\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u8868\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u307e\u305f\u306f\u305d\u306e\u4ed6\u306e\u30c7\u30fc\u30bf\u4fdd\u5b58\u5f62\u5f0f\u3067\u3042\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\uff1a<\/strong>\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306f\u3001\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u30d7\u30ed\u30bb\u30b9\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306e\u9593\u3067\u306e\u30c7\u30fc\u30bf\u306e\u79fb\u52d5\u3092\u8868\u3057\u307e\u3059\u3002\u77e2\u5370\u306f\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306e\u65b9\u5411\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<h2>Visual Paradigm Online\u3067Yourdon DeMarco DFD\u56f3\u3092\u4f5c\u6210\u3059\u308b<\/h2>\n<p>Visual Paradigm Online\u306f\u3001Yourdon DeMarco DFD\u56f3\u3092\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u7c21\u7d20\u5316\u3059\u308b\u5f37\u529b\u306a\u56f3\u4f5c\u6210\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u59cb\u3081\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>Visual Paradigm Online\u306b\u767b\u9332\u3059\u308b\uff1a<\/strong>\n<ul>\n<li>Visual Paradigm Online\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u3059\u3067\u306b\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u7121\u6599\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u767b\u9332\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>Yourdon DeMarco DFD\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u9078\u629e\u3059\u308b\uff1a<\/strong>\n<ul>\n<li>\u30ed\u30b0\u30a4\u30f3\u5f8c\u3001\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u304b\u3089\u300c\u56f3\u306e\u4f5c\u6210\u300d\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/li>\n<li>\u300c\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u300d\u30ab\u30c6\u30b4\u30ea\u3092\u9078\u629e\u3059\u308b\u3068\u3001\u59cb\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u591a\u6570\u306eYourdon DeMarco DFD\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\uff1a<\/strong>\n<ul>\n<li>\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u30d7\u30ed\u30bb\u30b9\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u30ad\u30e3\u30f3\u30d0\u30b9\u4e0a\u306b\u30c9\u30e9\u30c3\u30b0\u30a2\u30f3\u30c9\u30c9\u30ed\u30c3\u30d7\u3057\u307e\u3059\u3002<\/li>\n<li>\u8981\u7d20\u3092\u30c0\u30d6\u30eb\u30af\u30ea\u30c3\u30af\u3057\u3066\u540d\u524d\u3092\u5909\u66f4\u3057\u3001\u8aac\u660e\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u8981\u7d20\u3092\u63a5\u7d9a\u3059\u308b\uff1a<\/strong>\n<ul>\n<li>\u77e2\u5370\u3092\u4f7f\u7528\u3057\u3066\u3001\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u30d7\u30ed\u30bb\u30b9\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u9593\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u63a5\u7d9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u77e2\u5370\u306e\u5148\u7aef\u3092\u8abf\u6574\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306e\u65b9\u5411\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u56f3\u306e\u6587\u66f8\u5316\uff1a<\/strong>\n<ul>\n<li>Visual Paradigm Online\u3067\u306f\u3001\u56f3\u306b\u6587\u66f8\u3084\u30b3\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0\u3057\u3066\u3001\u6587\u8108\u3084\u8aac\u660e\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5171\u540c\u4f5c\u696d\u3068\u5171\u6709\uff1a<\/strong>\n<ul>\n<li>\u56f3\u3092\u95b2\u89a7\u307e\u305f\u306f\u7de8\u96c6\u3067\u304d\u308b\u3088\u3046\u306b\u30c1\u30fc\u30e0\u30e1\u30f3\u30d0\u30fc\u3092\u62db\u5f85\u3057\u3066\u3001\u5171\u540c\u4f5c\u696d\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/li>\n<li>\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u306b\u56f3\u3092\u5171\u6709\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3084\u30ec\u30d3\u30e5\u30fc\u3092\u53d7\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>\u4f8b\u306b\u3088\u308b\u5b66\u7fd2<\/h2>\n<p><a href=\"http:\/\/online.visual-paradigm.com\">Visual Paradigm Online<\/a>\u306b\u306f\u3001\u8c4a\u5bcc\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059<a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/features\/yourdon-demarco-dfd-software\/\">\u4e8b\u524d\u4f5c\u6210\u3055\u308c\u305f\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8<\/a>Yourdon DeMarco DFD\u56f3\u7528\u3002\u4f8b\u306b\u3088\u308b\u5b66\u7fd2\u306f\u3001DFD\u3092\u4f5c\u6210\u3059\u308b\u969b\u306e\u6982\u5ff5\u3084\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528\u3067\u304d\u308b\u4e00\u822c\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u3059\uff1a<img alt=\"\" class=\"alignnone size-full wp-image-20502\" decoding=\"async\" height=\"751\" loading=\"lazy\" sizes=\"auto, (max-width: 959px) 100vw, 959px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593.png 959w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593-300x235.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593-768x601.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593-150x117.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_650be1366a593-400x313.png 400w\" width=\"959\"\/><\/p>\n<ol>\n<li><strong>\u6ce8\u6587\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\uff1a<\/strong>\u6ce8\u6587\u306e\u5165\u529b\u304b\u3089\u51fa\u8377\u307e\u3067\u3001\u9867\u5ba2\u6ce8\u6587\u304c\u3069\u306e\u3088\u3046\u306b\u51e6\u7406\u3055\u308c\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u6ce8\u6587\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u7528\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u56f3\u66f8\u9928\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\uff1a<\/strong>\u56f3\u66f8\u9928\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u7528\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u66f8\u7c4d\u3001\u5229\u7528\u8005\u3001\u56f3\u66f8\u9928\u306e\u904b\u55b6\u304c\u3069\u306e\u3088\u3046\u306b\u8868\u73fe\u3055\u308c\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\u5728\u5eab\u8ffd\u8de1\u30b7\u30b9\u30c6\u30e0\uff1a<\/strong>\u5728\u5eab\u8ffd\u8de1\u30b7\u30b9\u30c6\u30e0\u7528\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u3001\u5728\u5eab\u30c7\u30fc\u30bf\u304c\u3055\u307e\u3056\u307e\u306a\u30d7\u30ed\u30bb\u30b9\u3092\u3069\u306e\u3088\u3046\u306b\u901a\u904e\u3059\u308b\u304b\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ol>\n<p>\u3053\u308c\u3089\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u691c\u8a0e\u3057\u3001\u81ea\u3089\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3067\u3001Yourdon DeMarco DFD\u56f3\u3092\u4f5c\u6210\u3059\u308b\u539f\u5247\u3092\u8fc5\u901f\u306b\u7406\u89e3\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5206\u6790\u3084\u8a2d\u8a08\u306e\u5b9f\u52d9\u306b\u52b9\u679c\u7684\u306b\u5fdc\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>Yourdon DeMarco DFD\u56f3\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u8cb4\u91cd\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002Visual Paradigm 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