{"id":8181,"date":"2022-01-26T01:28:21","date_gmt":"2022-01-26T01:28:21","guid":{"rendered":"https:\/\/www.cybermedian.com\/ja\/?p=8181"},"modified":"2026-04-20T09:13:21","modified_gmt":"2026-04-20T09:13:21","slug":"%e3%83%87%e3%83%bc%e3%82%bf%e3%83%95%e3%83%ad%e3%83%bc%e5%9b%b3%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%e3%80%81%e3%81%aa%e3%81%9c%e3%81%9d%e3%82%8c%e3%81%8c%e3%82%bd%e3%83%95%e3%83%88","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/ja\/what-is-data-flow-diagram-why-it-is-still-useful-for-software-development\/","title":{"rendered":"\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u3068\u306f\u4f55\u3067\u3059\u304b\u3001\u306a\u305c\u305d\u308c\u304c\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u307e\u3060\u5f79\u7acb\u3064\u306e\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=\"dbcd\" class=\"graf graf--p graf-after--h3\"><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\" data-href=\"https:\/\/www.visual-paradigm.com\/guide\/data-flow-diagram\/what-is-data-flow-diagram\/\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u30e2\u30c7\u30eb<\/a>\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u00a0\u00a0\u65b9\u6cd5\u3092\u793a\u3059\u76f4\u611f\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002\u5206\u6790\u30ec\u30d9\u30eb\u3067\u306f\u3001\u65e2\u5b58\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u30c7\u30fc\u30bf\u304c\u51e6\u7406\u3055\u308c\u308b\u65b9\u6cd5\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p id=\"9b9e\" class=\"graf graf--p graf-after--p\"><a class=\"markup--anchor markup--p-anchor\" href=\"http:\/\/dfd%20using%20yourdon%20and%20demarco%20notation\/\" target=\"_blank\" rel=\"noopener\" data-href=\"http:\/\/DFD Using Yourdon and DeMarco Notation\">DeMarco\u306e\u8457\u66f8StructuredSystems Analysis\u306e<\/a>\u767a\u884c\u5f8c\u00a0\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u30e2\u30c7\u30eb\u306f\u5206\u6790\u3067\u307e\u3059\u307e\u3059\u5e83\u304f\u4f7f\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306f\u3001\u3053\u306e\u4f5c\u696d\u304b\u3089\u958b\u767a\u3055\u308c\u305f\u69cb\u9020\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u56fa\u6709\u306e\u90e8\u5206\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30e2\u30c7\u30eb\u3067\u4f7f\u7528\u3055\u308c\u308b\u8a18\u53f7\u306f\u3001\u95a2\u6570\u51e6\u7406\uff08\u4e38\u307f\u3092\u5e2f\u3073\u305f\u9577\u65b9\u5f62\uff09\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30ec\u30fc\u30b8\uff08\u9577\u65b9\u5f62\uff09\u3001\u304a\u3088\u3073\u95a2\u6570\u9593\u306e\u30c7\u30fc\u30bf\u79fb\u52d5\uff08\u30e9\u30d9\u30eb\u4ed8\u304d\u77e2\u5370\uff09\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<h3 id=\"5137\" class=\"graf graf--h3 graf-after--p\"><span id=\"Why_DFD_still_useful_for_software_development\">\u306a\u305cDFD\u306f\u307e\u3060\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u5f79\u7acb\u3064\u306e\u3067\u3059\u304b\uff1f<\/span><\/h3>\n<p id=\"5d71\" class=\"graf graf--p graf-after--h3\"><a class=\"markup--anchor markup--p-anchor\" href=\"https:\/\/en.wikipedia.org\/wiki\/Data-flow_diagram\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/en.wikipedia.org\/wiki\/Data-flow_diagram\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u6307\u5411\u306e\u30e2\u30c7\u30ea\u30f3\u30b0<\/a>\u306f\u3001\u4e00\u90e8\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u3088\u3063\u3066\u6642\u4ee3\u9045\u308c\u306e\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3068\u898b\u306a\u3055\u308c\u3066\u3044\u00a0\u00a0\u307e\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u6700\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u8981\u4ef6\u5206\u6790\u30b7\u30f3\u30dc\u30eb\u306e1\u3064\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\uff08DFD\uff09\u306fUML\u306e\u6b63\u5f0f\u306a\u90e8\u5206\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001UML\u56f3\u3092\u88dc\u8db3\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u8981\u4ef6\u3068\u30d7\u30ed\u30bb\u30b9\u306b\u95a2\u3059\u308b\u8ffd\u52a0\u306e\u6d1e\u5bdf\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p id=\"6c71\" class=\"graf graf--p graf-after--p\">\u7279\u5b9a\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u304c\u30b7\u30b9\u30c6\u30e0\u5185\u3092\u3069\u306e\u3088\u3046\u306b\u79fb\u52d5\u3059\u308b\u304b\u3092\u8ffd\u8de1\u304a\u3088\u3073\u8a18\u9332\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30ca\u30ea\u30b9\u30c8\u304c\u4f55\u304c\u8d77\u3053\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u30e2\u30c7\u30eb\u306f\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u306e\u5229\u70b9\u306f\u3001\u4ed6\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u30b7\u30f3\u30dc\u30eb\u3068\u306f\u7570\u306a\u308a\u3001\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u611f\u7684\u3067\u3042\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u901a\u5e38\u3001\u8981\u4ef6\u306e\u5206\u6790\u3068\u691c\u8a3c\u306b\u95a2\u4e0e\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u6f5c\u5728\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u30e6\u30fc\u30b6\u30fc\u306b\u8aac\u660e\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4 id=\"4d4c\" class=\"graf graf--h4 graf-after--p\"><span id=\"Why_DFD\">\u306a\u305cDFD\u306a\u306e\u304b\uff1f<\/span><\/h4>\n<p id=\"248b\" class=\"graf graf--p graf-after--h4\">DFD\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u3068\u305d\u306e\u74b0\u5883\u9593\u3001\u304a\u3088\u3073\u30b7\u30b9\u30c6\u30e0\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u9593\u3067\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3001\u64cd\u4f5c\u3001\u4fdd\u5b58\u3001\u304a\u3088\u3073\u914d\u5e03\u3059\u308b\u6a5f\u80fd\u307e\u305f\u306f\u30d7\u30ed\u30bb\u30b9\u3092\u30b0\u30e9\u30d5\u30a3\u30ab\u30eb\u306b\u8868\u3057\u307e\u3059\u3002\u8996\u899a\u7684\u306a\u8868\u73fe\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u3068\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u8005\u306e\u9593\u306e\u512a\u308c\u305f\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u306b\u306a\u308a\u307e\u3059\u3002DFD\u306e\u69cb\u9020\u306b\u3088\u308a\u3001\u5927\u307e\u304b\u306a\u6982\u8981\u304b\u3089\u59cb\u3081\u3066\u3001\u8a73\u7d30\u306a\u56f3\u306e\u968e\u5c64\u306b\u62e1\u5f35\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002DFD\u306f\u3001\u6b21\u306e\u7406\u7531\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"4521\" class=\"graf graf--li graf-after--p\">\u30b7\u30b9\u30c6\u30e0\u306e\u8ad6\u7406\u60c5\u5831\u306e\u6d41\u308c<\/li>\n<li id=\"720b\" class=\"graf graf--li graf-after--li\">\u7269\u7406\u30b7\u30b9\u30c6\u30e0\u69cb\u7bc9\u8981\u4ef6\u306e\u6c7a\u5b9a<\/li>\n<li id=\"f707\" class=\"graf graf--li graf-after--li\">\u8868\u8a18\u306e\u5358\u7d14\u3055<\/li>\n<li id=\"c92f\" class=\"graf graf--li graf-after--li\">\u624b\u52d5\u304a\u3088\u3073\u81ea\u52d5\u30b7\u30b9\u30c6\u30e0\u8981\u4ef6\u306e\u78ba\u7acb<\/li>\n<\/ul>\n<h3 id=\"bd2d\" class=\"graf graf--h3 graf-after--li\"><span id=\"DFD_is_a_Top-Down_Decomposition_Process\">DFD\u306f\u30c8\u30c3\u30d7\u30c0\u30a6\u30f3\u306e\u5206\u89e3\u30d7\u30ed\u30bb\u30b9\u3067\u3059<\/span><\/h3>\n<p id=\"6cf8\" class=\"graf graf--p graf-after--h3\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u30e2\u30c7\u30ea\u30f3\u30b0\u306f\u300c\u30c8\u30c3\u30d7\u30c0\u30a6\u30f3\u300d\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u307e\u305a\u3001\u8abf\u9054\u30d7\u30ed\u30bb\u30b9\u5168\u4f53\u3092\u5206\u6790\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30b5\u30d6\u30d7\u30ed\u30bb\u30b9\u304c\u30c8\u30c3\u30d7\u30c0\u30a6\u30f3\u5206\u89e3\u65b9\u5f0f\u3067\u5206\u6790\u3055\u308c\u307e\u3059\u3002<\/p>\n<p id=\"b22f\" class=\"graf graf--p graf-after--p\">DFD\u306f\u3001\u3042\u3089\u3086\u308b\u30ec\u30d9\u30eb\u306e\u62bd\u8c61\u5316\u3067\u30b7\u30b9\u30c6\u30e0\u307e\u305f\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u524d\u8ff0\u306e\u3088\u3046\u306b\u3001DFD\u306f\u3001\u60c5\u5831\u306e\u6d41\u308c\u3068\u6a5f\u80fd\u306e\u8a73\u7d30\u306e\u5897\u52a0\u3092\u8868\u3059\u30ec\u30d9\u30eb\u306b\u5206\u5272\u3067\u304d\u307e\u3059\u3002DFD\u306e\u30ec\u30d9\u30eb\u756a\u53f7\u306f\u30010\u30011\u30012\u4ee5\u4e0a\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u306b\u30ec\u30d9\u30eb0 DFD\u3001\u30ec\u30d9\u30eb1 DFD\u3001\u30ec\u30d9\u30eb2DFD\u306e3\u3064\u306e\u4e3b\u8981\u306a\u30ec\u30d9\u30eb\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"d663\" 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\/0DTnOV6N4nnYaG-1l.png\" data-image-id=\"0*DTnOV6N4nnYaG-1l.png\" data-width=\"886\" data-height=\"577\" data-is-featured=\"true\" \/><figcaption class=\"imageCaption\">DFD\u30c8\u30c3\u30d7\u30c0\u30a6\u30f3\u5206\u89e3\u30d7\u30ed\u30bb\u30b9<\/figcaption><\/figure>\n<h4 id=\"e685\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Context_Diagram_Levels_of_DFD\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u2014DFD\u306e\u30ec\u30d9\u30eb<\/span><\/h4>\n<p id=\"7108\" class=\"graf graf--p graf-after--h4\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\uff08\u30ec\u30d9\u30eb0 DFD\u3068\u3082\u547c\u3070\u308c\u307e\u3059\uff09\u306f\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u8981\u4ef6\u5168\u4f53\u3092\u30d0\u30d6\u30eb\u3068\u3057\u3066\u8868\u3057\u3001\u5165\u529b\u30c7\u30fc\u30bf\u3068\u51fa\u529b\u30c7\u30fc\u30bf\u306f\u5165\u529b\u77e2\u5370\u3068\u51fa\u529b\u77e2\u5370\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p id=\"319a\" class=\"graf graf--p graf-after--p\">\u6b21\u306b\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u8907\u6570\u306e\u30d0\u30d6\u30eb\u3092\u6301\u3064DFD\u306b\u5206\u89e3\u3055\u308c\u307e\u3059\u3002\u6b21\u306b\u3001\u5404\u30d0\u30d6\u30eb\u3067\u8868\u3055\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u306e\u90e8\u5206\u304c\u5206\u89e3\u3055\u308c\u3001\u307e\u3059\u307e\u3059\u8a73\u7d30\u306a\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u306b\u8a18\u9332\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u624b\u5143\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b8c\u5168\u306b\u7406\u89e3\u3055\u308c\u308b\u307e\u3067\u3001\u5fc5\u8981\u306a\u30ec\u30d9\u30eb\u3067\u7e70\u308a\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p id=\"c5c4\" class=\"graf graf--p graf-after--p\">\u30ec\u30d9\u30eb\u9593\u306e\u5165\u529b\u3068\u51fa\u529b\u306e\u6570\u3092\u7dad\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001DeMacro\u30ec\u30d9\u30ea\u30f3\u30b0\u3068\u547c\u3070\u308c\u308b\u6982\u5ff5\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30d0\u30d6\u30eb\u300cA\u300d\u306b2\u3064\u306e\u5165\u529bX1\u3068X2\u3001\u304a\u3088\u30731\u3064\u306e\u51fa\u529bY\u304c\u3042\u308b\u5834\u5408\u3001\u4e0a\u4f4d\u30ec\u30d9\u30eb\u306eDFD\u300cA\u300d\u3092\u8868\u3059\u30b5\u30d6\u30ec\u30d9\u30eb\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u306b\u306f\u3001\u6b63\u78ba\u306b2\u3064\u306e\u5916\u90e8\u5165\u529b\u30681\u3064\u306e\u5916\u90e8\u51fa\u529b\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p id=\"a817\" class=\"graf graf--p graf-after--p\">1\u30ec\u30d9\u30ebDFD\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u304c\u8907\u6570\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30ec\u30d9\u30eb\u3067\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4e3b\u306a\u6a5f\u80fd\u3092\u5f37\u8abf\u3057\u30010\u30ec\u30d9\u30ebDFD\u306e\u9ad8\u30ec\u30d9\u30eb\u30d7\u30ed\u30bb\u30b9\u3092\u3055\u3089\u306b\u30b5\u30d6\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3057\u3066\u3001\u51e6\u7406\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u8a73\u7d30\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<p id=\"5243\" class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\uff08\u30ec\u30d9\u30eb0 DFD\uff09\u200a<\/strong>\u00a0\u2014\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3DFD\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u6982\u8981\u3068\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4ed6\u306e\u90e8\u5206\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u8868\u3059\u56f3\u3067\u3059\u3002<\/p>\n<p id=\"f289\" class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\">\u30ec\u30d9\u30eb1\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3<\/strong>\u200a\u2014\u30ec\u30d9\u30eb1\u306eDFD\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u3092\u69cb\u6210\u3059\u308b\u4e3b\u8981\u306a\u30b5\u30d6\u30d7\u30ed\u30bb\u30b9\u3068\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u3088\u308a\u3082\u30b7\u30b9\u30c6\u30e0\u306e\u8a73\u7d30\u306a\u30d3\u30e5\u30fc\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<p id=\"7f01\" class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\">\u30ec\u30d9\u30eb2\uff08\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0b\uff09<\/strong>\u00a0\u200a\u2014\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u30e2\u30c7\u30ea\u30f3\u30b0\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306e\u4e3b\u306a\u5229\u70b9\u306f\u3001\u300c\u30ec\u30d9\u30ea\u30f3\u30b0\u300d\u3068\u547c\u3070\u308c\u308b\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3092\u901a\u3058\u3066\u3001\u5b9f\u969b\u306e\u30b7\u30b9\u30c6\u30e0\u306e\u8a73\u7d30\u306a\u8907\u96d1\u3055\u3092\u62bd\u8c61\u7684\u306a\u30ec\u30d9\u30eb\u3067\u7ba1\u7406\u304a\u3088\u3073\u30e2\u30c7\u30eb\u5316\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u306e\u4e00\u90e8\u306e\u8981\u7d20\u306f\u3001\u968e\u5c64\u306e\u4e0b\u4f4d\u30ec\u30d9\u30eb\u3067\u3088\u308a\u8a73\u7d30\u306a\u30e2\u30c7\u30eb\u306b\u5206\u89e3\uff08\u300c\u5206\u89e3\u300d\uff09\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3 id=\"8d01\" class=\"graf graf--h3 graf-after--p\"><span id=\"DFD_Levels_Example_Food_Ordering_System\">DFD\u30ec\u30d9\u30eb\u2014\u4f8b<strong class=\"markup--strong markup--h3-strong\"><em class=\"markup--em markup--h3-em\">\u2014\u98df\u54c1\u6ce8\u6587\u30b7\u30b9\u30c6\u30e0<\/em><\/strong><\/span><\/h3>\n<p id=\"7b50\" class=\"graf graf--p graf-after--h3\"><strong class=\"markup--strong markup--p-strong\">\u30ec\u30d9\u30eb0<\/strong><\/p>\n<p id=\"e54b\" class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3<\/strong>\u3068\u3082\u547c\u3070\u308c\u00a0\u307e\u3059\u3002\u3053\u308c\u306f\u62bd\u8c61\u5316\u30d3\u30e5\u30fc\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u304a\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u3092\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u306e\u95a2\u4fc2\u3092\u6301\u3064\u5358\u4e00\u306e\u30d7\u30ed\u30bb\u30b9\u3068\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"3c49\" class=\"graf graf--li graf-after--p\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u306f1\u30da\u30fc\u30b8\u306b\u53ce\u307e\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li id=\"d17a\" class=\"graf graf--li graf-after--li\">\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u306e\u30d7\u30ed\u30bb\u30b9\u540d\u306f\u3001\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u306e\u540d\u524d\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li id=\"be81\" class=\"graf graf--li graf-after--li\">\u305f\u3068\u3048\u3070\u3001\u30b0\u30ec\u30fc\u30c7\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3001\u6ce8\u6587\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u3001\u767b\u9332\u30b7\u30b9\u30c6\u30e0\u3002<\/li>\n<\/ul>\n<figure id=\"94f8\" 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\/1fgsircZo8sN8GJUaj3F7QA.png\" data-image-id=\"1*fgsircZo8sN8GJUaj3F7QA.png\" data-width=\"862\" data-height=\"296\" \/><figcaption class=\"imageCaption\"><em class=\"markup--em markup--figure-em\">\u98df\u54c1\u6ce8\u6587\u30b7\u30b9\u30c6\u30e0\u2014\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u2014\u30ec\u30d9\u30eb0 DFD<\/em><\/figcaption><\/figure>\n<p id=\"1a04\" class=\"graf graf--p graf-after--figure\">1\u30ec\u30d9\u30ebDFD\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u304c\u8907\u6570\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30ec\u30d9\u30eb\u3067\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4e3b\u306a\u6a5f\u80fd\u3092\u5f37\u8abf\u3057\u30010\u30ec\u30d9\u30ebDFD\u306e\u9ad8\u30ec\u30d9\u30eb\u30d7\u30ed\u30bb\u30b9\u3092\u3055\u3089\u306b\u30b5\u30d6\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3057\u3066\u3001\u51e6\u7406\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u8a73\u7d30\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<p id=\"901f\" class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\"><em class=\"markup--em markup--p-em\">\u30ec\u30d9\u30eb1\u2014\u98df\u54c1\u6ce8\u6587\u30b7\u30b9\u30c6\u30e0<\/em><\/strong><\/p>\n<p id=\"2869\" class=\"graf graf--p graf-after--p\">1\u30ec\u30d9\u30ebDFD\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u56f3\u304c\u8907\u6570\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30ec\u30d9\u30eb\u3067\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4e3b\u306a\u6a5f\u80fd\u3092\u5f37\u8abf\u3057\u30010\u30ec\u30d9\u30ebDFD\u306e\u9ad8\u30ec\u30d9\u30eb\u30d7\u30ed\u30bb\u30b9\u3092\u3055\u3089\u306b\u30b5\u30d6\u30d7\u30ed\u30bb\u30b9\u306b\u5206\u89e3\u3057\u3066\u3001\u51e6\u7406\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u8a73\u7d30\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"0e59\" 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\/16dIMY1UE44SrDdFn-38jGQ.png\" data-image-id=\"1*6dIMY1UE44SrDdFn-38jGQ.png\" data-width=\"839\" data-height=\"467\" \/><figcaption class=\"imageCaption\">\u30ec\u30d9\u30eb1DFD \u2014\u98df\u54c1\u6ce8\u6587\u30b7\u30b9\u30c6\u30e0\u306e\u4f8b<\/figcaption><\/figure>\n<p id=\"3fe7\" class=\"graf graf--p graf-after--figure\">\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<h3 id=\"5e02\" class=\"graf graf--h3 graf-after--p\"><span id=\"DFD_Symbols\">DFD\u30b7\u30f3\u30dc\u30eb<\/span><\/h3>\n<p id=\"96ef\" class=\"graf graf--p graf-after--h3\">\u00a0\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u3092\u8868\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b<strong class=\"markup--strong markup--p-strong\">4\u3064\u306e\u57fa\u672c\u7684\u306a\u8a18\u53f7<\/strong>\u304c\u3042\u308a\u307e\u3059\u00a0\u3002<\/p>\n<h3 id=\"689c\" class=\"graf graf--h3 graf-after--p\"><span id=\"Process\">\u30d7\u30ed\u30bb\u30b9<\/span><\/h3>\n<p id=\"f695\" class=\"graf graf--p graf-after--h3\">\u30d7\u30ed\u30bb\u30b9\u306f\u5165\u529b\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308a\u3001\u7570\u306a\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u307e\u305f\u306f\u5f62\u5f0f\u3067\u51fa\u529b\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u3092\u53ce\u96c6\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u306e\u3068\u540c\u3058\u304f\u3089\u3044\u5358\u7d14\u306a\u5834\u5408\u3082\u3042\u308c\u3070\u3001\u5317\u897f\u5730\u57df\u306e\u3059\u3079\u3066\u306e\u5c0f\u58f2\u5e97\u306e\u6708\u9593\u58f2\u4e0a\u3092\u542b\u3080\u30ec\u30dd\u30fc\u30c8\u3092\u4f5c\u6210\u3059\u308b\u306e\u3068\u540c\u3058\u304f\u3089\u3044\u8907\u96d1\u306a\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p id=\"d4c3\" class=\"graf graf--p graf-after--p\">\u3059\u3079\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u306f\u3001\u5b9f\u884c\u3059\u308b\u6a5f\u80fd\u3092\u8b58\u5225\u3059\u308b\u540d\u524d\u304c\u4ed8\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p id=\"32f6\" class=\"graf graf--p graf-after--p\">\u540d\u524d\u306f\u3001\u52d5\u8a5e\u3068\u305d\u308c\u306b\u7d9a\u304f\u5358\u6570\u540d\u8a5e\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<p id=\"9161\" class=\"graf graf--p graf-after--p\">\u4f8b\uff1a<\/p>\n<ul class=\"postList\">\n<li id=\"2180\" class=\"graf graf--li graf-after--p\">\u652f\u6255\u3044\u3092\u9069\u7528\u3059\u308b<\/li>\n<li id=\"8377\" class=\"graf graf--li graf-after--li\">\u30b3\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u8a08\u7b97\u3059\u308b<\/li>\n<li id=\"8e28\" class=\"graf graf--li graf-after--li\">\u6ce8\u6587\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n<\/ul>\n<h4 id=\"4463\" class=\"graf graf--h4 graf-after--li\"><span id=\"DFD_Notation\">DFD\u8868\u8a18<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"b2b8\" class=\"graf graf--li graf-after--h4\">\u89d2\u306e\u4e38\u3044\u9577\u65b9\u5f62\u306f\u30d7\u30ed\u30bb\u30b9\u3092\u8868\u3057\u307e\u3059<\/li>\n<li id=\"084f\" class=\"graf graf--li graf-after--li\">\u30d7\u30ed\u30bb\u30b9\u306b\u306f\u3001\u7c21\u5358\u306b\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306bID\u304c\u4ed8\u3051\u3089\u308c\u3066\u3044\u307e\u3059<\/li>\n<\/ul>\n<figure id=\"11da\" 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\/0EDe7N518PkPxVVLo.png\" data-image-id=\"0*EDe7N518PkPxVVLo.png\" data-width=\"377\" data-height=\"71\" \/><\/figure>\n<h4 id=\"af8f\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Process_Example\">\u30d7\u30ed\u30bb\u30b9\u4f8b<\/span><\/h4>\n<figure id=\"5dfa\" class=\"graf graf--figure graf-after--h4\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0Ec6H3EPselPHna9t.png\" data-image-id=\"0*Ec6H3EPselPHna9t.png\" data-width=\"539\" data-height=\"140\" \/><\/figure>\n<h4 id=\"8cfc\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Data_Flow\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc<\/span><\/h4>\n<p id=\"d620\" class=\"graf graf--p graf-after--h4\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306f\u3001\u30c7\u30fc\u30bf\u304c\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u306e\u3042\u308b\u90e8\u5206\u304b\u3089\u5225\u306e\u90e8\u5206\u306b\u79fb\u52d5\u3059\u308b\u305f\u3081\u306e\u30d1\u30b9\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306f\u3001\u9867\u5ba2ID\u306a\u3069\u306e\u5358\u4e00\u306e\u30c7\u30fc\u30bf\u8981\u7d20\u3092\u8868\u3059\u5834\u5408\u3082\u3042\u308c\u3070\u3001\u30c7\u30fc\u30bf\u8981\u7d20\u306e\u30bb\u30c3\u30c8\uff08\u307e\u305f\u306f\u30c7\u30fc\u30bf\u69cb\u9020\uff09\u3092\u8868\u3059\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p id=\"7183\" class=\"graf graf--p graf-after--p\">\u4f8b\uff1a<\/p>\n<ul class=\"postList\">\n<li id=\"ea21\" class=\"graf graf--li graf-after--p\">Customer_info\uff08LastName\u3001FirstName\u3001SS\uff03\u3001Tel\uff03\u306a\u3069\uff09<\/li>\n<li id=\"e3d2\" class=\"graf graf--li graf-after--li\">Order_info\uff08OrderId\u3001Item\uff03\u3001OrderDate\u3001CustomerID\u306a\u3069\uff09\u3002<\/li>\n<\/ul>\n<h4 id=\"b4a9\" class=\"graf graf--h4 graf-after--li\"><span id=\"Data_flow_Example\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306e\u4f8b\uff1a<\/span><\/h4>\n<figure id=\"f6db\" class=\"graf graf--figure graf-after--h4\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0vzLEdbukTYs6Dvsf.png\" data-image-id=\"0*vzLEdbukTYs6Dvsf.png\" data-width=\"331\" data-height=\"140\" \/><\/figure>\n<h4 id=\"876a\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Notation\">\u8868\u8a18<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"b617\" class=\"graf graf--li graf-after--h4\">\u5165\u3063\u3066\u304f\u308b\u77e2\u5370\u306e\u4ed8\u3044\u305f\u76f4\u7dda\u306f\u5165\u529b\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3067\u3059<\/li>\n<li id=\"4326\" class=\"graf graf--li graf-after--li\">\u51fa\u3066\u884c\u304f\u77e2\u5370\u306e\u4ed8\u3044\u305f\u76f4\u7dda\u306f\u51fa\u529b\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3067\u3059<\/li>\n<\/ul>\n<p id=\"e2fc\" class=\"graf graf--p graf-after--li\">\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\uff1a<\/p>\n<p id=\"af07\" class=\"graf graf--p graf-after--p\">\u3059\u3079\u3066\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u30c7\u30fc\u30bf\u3092\u3042\u308b\u5f62\u5f0f\u304b\u3089\u5225\u306e\u5f62\u5f0f\u306b\u5909\u66f4\u3059\u308b\u305f\u3081\u3001\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u304c\u5404\u30d7\u30ed\u30bb\u30b9\u30b7\u30f3\u30dc\u30eb\u306b\u5165\u529b\u3055\u308c\u30011\u3064\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u304c\u7d42\u4e86\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3 id=\"2247\" class=\"graf graf--h3 graf-after--p\"><span id=\"Data_Store\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2<\/span><\/h3>\n<p id=\"ca21\" class=\"graf graf--p graf-after--h3\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u307e\u305f\u306f\u30c7\u30fc\u30bf\u30ea\u30dd\u30b8\u30c8\u30ea\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u3067\u4f7f\u7528\u3055\u308c\u30011\u3064\u4ee5\u4e0a\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u5f8c\u3067\u4fdd\u5b58\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u72b6\u6cc1\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<h4 id=\"7137\" class=\"graf graf--h4 graf-after--p\"><span id=\"Notation1\">\u8868\u8a18<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"51ca\" class=\"graf graf--li graf-after--h4\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306f\u3001\u5916\u5411\u304d\u306e\u77e2\u5370\u3067\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li id=\"d832\" class=\"graf graf--li graf-after--li\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306f\u3001\u5165\u3063\u3066\u304f\u308b\u77e2\u5370\u3067\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li id=\"2f79\" class=\"graf graf--li graf-after--li\">\u4f8b\u3068\u3057\u3066\u306f\u3001\u5728\u5eab\u3001\u58f2\u639b\u91d1\u3001\u6ce8\u6587\u3001\u65e5\u6b21\u652f\u6255\u3044\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<figure id=\"778b\" 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\/02k_6sJt529bF_gsS.png\" data-image-id=\"0*2k_6sJt529bF_gsS.png\" data-width=\"418\" data-height=\"41\" \/><\/figure>\n<h4 id=\"ea69\" class=\"graf graf--h4 graf-after--figure\"><span id=\"Data_Store_Example\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306e\u4f8b<\/span><\/h4>\n<figure id=\"c483\" class=\"graf graf--figure graf-after--h4\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0569xERyhl7UZTw8E.png\" data-image-id=\"0*569xERyhl7UZTw8E.png\" data-width=\"334\" data-height=\"180\" \/><\/figure>\n<p id=\"d1a8\" class=\"graf graf--p graf-after--figure\">\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\uff1a<\/p>\n<ul class=\"postList\">\n<li id=\"a221\" class=\"graf graf--li graf-after--p\">\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u4f7f\u7528\u3057\u3066\u30d7\u30ed\u30bb\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li id=\"43e5\" class=\"graf graf--li graf-after--li\">\u5404\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306b\u306f\u3001\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u5165\u529b\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3068\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u51fa\u529b\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u304c\u5fc5\u8981\u3067\u3059\uff08\u51fa\u529b\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u304c\u5236\u5fa1\u30e1\u30c3\u30bb\u30fc\u30b8\u307e\u305f\u306f\u78ba\u8a8d\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3042\u308b\u5834\u5408\u3067\u3082\uff09\u3002<\/li>\n<\/ul>\n<h3 id=\"bfa8\" class=\"graf graf--h3 graf-after--li\"><span id=\"External_Entity\">\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3<\/span><\/h3>\n<p id=\"a752\" class=\"graf graf--p graf-after--h3\">\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306b\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3057\u305f\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u51fa\u529b\u3092\u53d7\u4fe1\u3057\u305f\u308a\u3059\u308b\u500b\u4eba\u3001\u90e8\u9580\u3001\u5916\u90e8\u7d44\u7e54\u3001\u307e\u305f\u306f\u305d\u306e\u4ed6\u306e\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u306e\u5883\u754c\u5916\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3059\u3002\u305d\u308c\u3089\u306f\u3001\u60c5\u5831\u30b7\u30b9\u30c6\u30e0\u304c\u5916\u754c\u3068\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u304b\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"7bcf\" class=\"graf graf--li graf-after--p\">\u9577\u65b9\u5f62\u306f\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u8868\u3057\u307e\u3059<\/li>\n<li id=\"0e0b\" class=\"graf graf--li graf-after--li\">\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3059\u308b\u304b\u3001\u30c7\u30fc\u30bf\u3092\u53d7\u4fe1\u3057\u307e\u3059<\/li>\n<li id=\"9d29\" class=\"graf graf--li graf-after--li\">\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3057\u307e\u305b\u3093<\/li>\n<\/ul>\n<h4 id=\"d044\" class=\"graf graf--h4 graf-after--li\"><span id=\"Notation2\">\u8868\u8a18<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"6ee1\" class=\"graf graf--li graf-after--h4\">\u6ce8\u6587\u3092\u9001\u4fe1\u3057\u3066\u304b\u3089\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u8acb\u6c42\u66f8\u3092\u53d7\u3051\u53d6\u308b\u9867\u5ba2<\/li>\n<li id=\"ab62\" class=\"graf graf--li graf-after--li\">\u30d9\u30f3\u30c0\u30fc\u304c\u8acb\u6c42\u66f8\u3092\u767a\u884c\u3057\u307e\u3059<\/li>\n<\/ul>\n<figure id=\"c830\" 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\/0NKFTg1DoOboXpTc.png\" data-image-id=\"0*NKFTg1DoOboXpTc_.png\" data-width=\"390\" data-height=\"41\" \/><\/figure>\n<h4 id=\"d473\" class=\"graf graf--h4 graf-after--figure\"><span id=\"External_Entity_Example\">\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u4f8b<\/span><\/h4>\n<figure id=\"ca7d\" class=\"graf graf--figure graf-after--h4\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0hfTApAURxleMa6XZ.png\" data-image-id=\"0*hfTApAURxleMa6XZ.png\" data-width=\"311\" data-height=\"71\" \/><\/figure>\n<p id=\"ff78\" class=\"graf graf--p graf-after--figure\">\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\uff1a<\/p>\n<ul class=\"postList\">\n<li id=\"4dfa\" class=\"graf graf--li graf-after--p\">\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u30c7\u30fc\u30bf\u306e\u767a\u4fe1\u5143\u307e\u305f\u306f\u6700\u7d42\u7684\u306a\u5b9b\u5148\u3067\u3042\u308b\u305f\u3081\u3001\u30bf\u30fc\u30df\u30cd\u30fc\u30bf\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/li>\n<li id=\"28a9\" class=\"graf graf--li graf-after--li graf--trailing\">\u5916\u90e8\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u4ecb\u3057\u3066\u30d7\u30ed\u30bb\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"section section--body section--last\">\n<div class=\"section-divider\">\n<hr class=\"section-divider\" \/>\n<\/div>\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<h3 id=\"df4f\" class=\"graf graf--h3 graf--leading\"><span id=\"Rule_of_Data_Flow\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u306e\u30eb\u30fc\u30eb<\/span><\/h3>\n<p id=\"0441\" class=\"graf graf--p graf-after--h3\">DFD\u3092\u958b\u767a\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30eb\u306e1\u3064\u306f\u3001\u3059\u3079\u3066\u306e\u30d5\u30ed\u30fc\u304c\u51e6\u7406\u30b9\u30c6\u30c3\u30d7\u3067\u958b\u59cb\u304a\u3088\u3073\u7d42\u4e86\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306f\u51e6\u7406\u4e2d\u306b\u305d\u308c\u81ea\u4f53\u3067\u5909\u63db\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u3053\u308c\u306f\u975e\u5e38\u306b\u8ad6\u7406\u7684\u3067\u3059\u3002\u7d4c\u9a13\u5247\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e0d\u6b63\u306a\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u3092\u7c21\u5358\u306b\u8b58\u5225\u3057\u3001DFD\u3067\u4fee\u6b63\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4 id=\"96c2\" class=\"graf graf--h4 graf-after--p\"><span id=\"Wrong_Right_Description\">\u9593\u9055\u3063\u305f\/\u6b63\u3057\u3044\u8aac\u660e<\/span><\/h4>\n<figure id=\"8116\" class=\"graf graf--figure graf-after--h4\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0mO8fiwOTgYQuyRPL.png\" data-image-id=\"0*mO8fiwOTgYQuyRPL.png\" data-width=\"296\" data-height=\"42\" \/><\/figure>\n<figure id=\"2dd6\" class=\"graf graf--figure graf-after--figure\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0Y6pRNDUxux0qwlD0.png\" data-image-id=\"0*Y6pRNDUxux0qwlD0.png\" data-width=\"355\" data-height=\"71\" \/><\/figure>\n<p id=\"6baa\" class=\"graf graf--p 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graf-after--figure\">\u30c7\u30fc\u30bf\u306f\u3001\u51e6\u7406\u3055\u308c\u305a\u306b1\u3064\u306e\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u304b\u3089\u5225\u306e\u30c7\u30fc\u30bf\u30b9\u30c8\u30a2\u306b\u76f4\u63a5\u79fb\u52d5\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h3 id=\"1c08\" class=\"graf graf--h3 graf-after--p\"><span id=\"Other_frequently-made_mistakes_in_DFD\">DFD\u3067\u3088\u304f\u3042\u308b\u305d\u306e\u4ed6\u306e\u9593\u9055\u3044<\/span><\/h3>\n<p id=\"b84a\" class=\"graf graf--p graf-after--h3\">2\u756a\u76ee\u306e\u30af\u30e9\u30b9\u306eDFD\u30df\u30b9\u306f\u30011\u3064\u306e\u51e6\u7406\u30b9\u30c6\u30c3\u30d7\u304b\u3089\u306e\u51fa\u529b\u304c\u305d\u306e\u5165\u529b\u3068\u4e00\u81f4\u305b\u305a\u3001\u6b21\u306e\u3088\u3046\u306b\u5206\u985e\u3067\u304d\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"26fb\" class=\"graf graf--li 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src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0Lj0XP6QTspzza5vD.png\" data-image-id=\"0*Lj0XP6QTspzza5vD.png\" data-width=\"634\" data-height=\"468\" \/><\/figure>\n<h3 id=\"c9dd\" class=\"graf graf--h3 graf-after--figure\"><span id=\"Free_UML_Tool\">\u7121\u6599\u306eUML\u30c4\u30fc\u30eb<\/span><\/h3>\n<ul class=\"postList\">\n<li id=\"8a80\" class=\"graf graf--li graf-after--h3\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/online.visual-paradigm.com\/diagrams\/features\/dfd-maker\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/online.visual-paradigm.com\/diagrams\/features\/dfd-maker\/\">\u30aa\u30f3\u30e9\u30a4\u30f3\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u30e1\u30fc\u30ab\u30fc<\/a><\/li>\n<li id=\"dc8b\" class=\"graf graf--li graf-after--li\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/www.visual-paradigm.com\/tutorials\/how-to-create-data-flow-diagram\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/www.visual-paradigm.com\/tutorials\/how-to-create-data-flow-diagram\/\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\uff08DFD\uff09\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u306f\uff1f<\/a><\/li>\n<li id=\"ad68\" class=\"graf graf--li graf-after--li\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/www.visual-paradigm.com\/solution\/drawdfd\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/www.visual-paradigm.com\/solution\/drawdfd\/\">\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\uff08DFD\uff09\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2<\/a><\/li>\n<\/ul>\n<h4 id=\"3bd4\" class=\"graf graf--h4 graf-after--li\"><span id=\"DFD_Different_Notation\">DFD\u306e\u7570\u306a\u308b\u8868\u8a18<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"318f\" class=\"graf graf--li graf-after--h4 graf--trailing\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/online.visual-paradigm.com\/cn\/knowledge\/software-design\/gane-sarson-dfd-tutorial\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/online.visual-paradigm.com\/cn\/knowledge\/software-design\/gane-sarson-dfd-tutorial\/\"><span class=\"goog-text-highlight\">Gane-Sarson\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/span><\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u6307\u5411\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u306f\u3001\u4e00\u90e8\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a8\u30f3\u30b8\u30cb\u30a2\u304b\u3089\u306f\u6642\u4ee3\u9045\u308c\u306e\u6280\u8853\u3060\u3068\u601d\u308f\u308c\u3066\u3044\u308b\u304c\u3001\u4eca\u3067\u3082\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u8981\u6c42\u5206\u6790\u8a18\u53f7\u306e\u4e00\u3064\u3067\u3042\u308b\u3002\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u56f3\uff08DFD\uff09\u306fUML\u306e\u6b63\u5f0f\u306a\u30d1\u30fc\u30c8\u3067\u306f\u306a\u3044\u304c\u3001UML\u56f3\u3092\u88dc\u5b8c\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u8981\u4ef6\u3084\u30d7\u30ed\u30bb\u30b9\u306b\u95a2\u3059\u308b\u3055\u3089\u306a\u308b\u6d1e\u5bdf\u3092\u5f97\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n","protected":false},"author":4,"featured_media":8183,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[13,5,3],"tags":[],"class_list":["post-8181","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-online-diagrams","category-software-engineering","category-unified-modeling-language"],"yoast_head":"<!-- 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