{"id":1503,"date":"2026-02-24T05:15:48","date_gmt":"2026-02-24T05:15:48","guid":{"rendered":"https:\/\/www.go-diagram.com\/ja\/case-study-understanding-use-case-diagrams-2\/"},"modified":"2026-02-24T05:15:48","modified_gmt":"2026-02-24T05:15:48","slug":"case-study-understanding-use-case-diagrams-2","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/ja\/case-study-understanding-use-case-diagrams-2\/","title":{"rendered":"\u4e8b\u4f8b\u7814\u7a76\uff1a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306e\u7406\u89e3"},"content":{"rendered":"<h2>\u306f\u3058\u3081\u306b<\/h2>\n<p dir=\"auto\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306f\u3001<a href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-uml\/\">\u7d71\u4e00\u30e2\u30c7\u30ea\u30f3\u30b0\u8a00\u8a9e\uff08UML\uff09<\/a>\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u8981\u4ef6\u3092\u628a\u63e1\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\uff08\u30a2\u30af\u30bf\u30fc\uff09\u3068\u30b7\u30b9\u30c6\u30e0\u306e\u9593\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u3001\u7279\u5b9a\u306e\u76ee\u6a19\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u4e8b\u4f8b\u7814\u7a76\u3067\u306f\u3001\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306e\u4e3b\u8981\u306a\u6982\u5ff5\u3001\u305d\u306e\u91cd\u8981\u6027\u3001\u305d\u3057\u3066\u52b9\u679c\u7684\u306b\u4f5c\u6210\u30fb\u89e3\u91c8\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u8a73\u3057\u304f\u8b70\u8ad6\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n<p dir=\"auto\"><img alt=\"Use Case Diagram - Website _ Structuring use cases with extend and ...\" decoding=\"async\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/Use-Case-Diagram-Website-_-Structuring-use-cases-with-extend-and-include-use-case-1.png\"\/><\/p>\n<h2>\u4e3b\u8981\u306a\u6982\u5ff5<\/h2>\n<h3>\u30a2\u30af\u30bf\u30fc<\/h3>\n<p dir=\"auto\">\u30a2\u30af\u30bf\u30fc\u306f\u3001\u30e2\u30c7\u30eb\u5316\u3055\u308c\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u307e\u305f\u306f\u4ed6\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u8868\u3057\u307e\u3059\u3002\u56f3\u306b\u306f\u3001\u300c\u30b5\u30a4\u30c8\u30e6\u30fc\u30b6\u30fc\u300d\u3068\u300c\u30a6\u30a7\u30d6\u30de\u30b9\u30bf\u30fc\u300d\u306e2\u3064\u306e\u30a2\u30af\u30bf\u30fc\u304c\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h3>\n<p dir=\"auto\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30a2\u30af\u30bf\u30fc\u306b\u63d0\u4f9b\u3059\u308b\u6a5f\u80fd\u3084\u30b5\u30fc\u30d3\u30b9\u3092\u8868\u3057\u307e\u3059\u3002\u5404\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001\u30a2\u30af\u30bf\u30fc\u304c\u30b7\u30b9\u30c6\u30e0\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u3053\u3068\u3067\u9054\u6210\u3057\u305f\u3044\u7279\u5b9a\u306e\u76ee\u6a19\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u95a2\u4fc2<\/h3>\n<ul>\n<li><strong>\u95a2\u9023<\/strong>\uff1a\u30a2\u30af\u30bf\u30fc\u304c\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u3084\u308a\u53d6\u308a\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u3002<\/li>\n<li><strong>\u5305\u542b<\/strong>\uff1a\u3042\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304c\u5225\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u632f\u308b\u821e\u3044\u3092\u542b\u3093\u3067\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u3002<\/li>\n<li><strong>\u62e1\u5f35<\/strong>\uff1a\u7279\u5b9a\u306e\u6761\u4ef6\u4e0b\u3067\u3001\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u8ffd\u52a0\u306e\u632f\u308b\u821e\u3044\u3092\u62e1\u5f35\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3059\u3002<\/li>\n<li><strong>\u62e1\u5f35\u30dd\u30a4\u30f3\u30c8<\/strong>\uff1a\u62e1\u5f35\u3092\u8ffd\u52a0\u3067\u304d\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u5185\u306e\u7279\u5b9a\u306e\u30dd\u30a4\u30f3\u30c8\u3002<\/li>\n<\/ul>\n<h2>\u306a\u305c\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u3092\u4f7f\u3046\u306e\u304b\uff1f<\/h2>\n<p dir=\"auto\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306f\u4ee5\u4e0b\u306e\u7406\u7531\u304b\u3089\u4e0d\u53ef\u6b20\u3067\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u8981\u4ef6\u306e\u53ce\u96c6<\/strong>\uff1a\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u8981\u4ef6\u3092\u7279\u5b9a\u3057\u3001\u6587\u66f8\u5316\u3059\u308b\u306e\u3092\u52a9\u3051\u307e\u3059\u3002<\/li>\n<li><strong>\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3<\/strong>\uff1a\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u306b\u5bfe\u3057\u3066\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u306b\u3064\u3044\u3066\u660e\u78ba\u304b\u3064\u7c21\u6f54\u306b\u4f1d\u3048\u308b\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8a2d\u8a08\u3068\u5b9f\u88c5<\/strong>\uff1a\u30c7\u30b6\u30a4\u30ca\u30fc\u3068\u958b\u767a\u8005\u304c\u30b7\u30b9\u30c6\u30e0\u304c\u4f55\u3092\u3059\u3079\u304d\u304b\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u8a2d\u8a08\u56f3\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306e\u4f5c\u6210\u65b9\u6cd5<\/h2>\n<h3>\u30b9\u30c6\u30c3\u30d71\uff1a\u30a2\u30af\u30bf\u30fc\u3092\u7279\u5b9a\u3059\u308b<\/h3>\n<p dir=\"auto\">\u30b7\u30b9\u30c6\u30e0\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u3059\u3079\u3066\u306e\u30a2\u30af\u30bf\u30fc\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002\u56f3\u3067\u306f\u3001\u30a2\u30af\u30bf\u30fc\u306f\u300c\u30b5\u30a4\u30c8\u30e6\u30fc\u30b6\u30fc\u300d\u3068\u300c\u30a6\u30a7\u30d6\u30de\u30b9\u30bf\u30fc\u300d\u3067\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d72\uff1a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u5b9a\u7fa9<\/h3>\n<p dir=\"auto\">\u5404\u30a2\u30af\u30bf\u30fc\u306b\u3064\u3044\u3066\u3001\u305d\u308c\u3089\u304c\u5bfe\u8a71\u3059\u308b\u6a5f\u80fd\u3092\u8868\u3059\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u300c\u30b5\u30a4\u30c8\u30e6\u30fc\u30b6\u30fc\u300d\u306b\u306f\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u691c\u7d22 \u2013 \u30d5\u30eb\u30c6\u30ad\u30b9\u30c8\u300d\u3001\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u95b2\u89a7\u300d\u3001\u300c\u30a4\u30d9\u30f3\u30c8\u306e\u8868\u793a\u300d\u3001\u300c\u30ed\u30b0\u30a4\u30f3\u300d\u306a\u3069\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d73\uff1a\u95a2\u4fc2\u306e\u78ba\u7acb<\/h3>\n<ul>\n<li><strong>\u95a2\u9023<\/strong>\uff1a\u30a2\u30af\u30bf\u30fc\u3092\u305d\u308c\u305e\u308c\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u3002<\/li>\n<li><strong>\u5305\u542b<\/strong>\uff1a\u4ed6\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u632f\u308b\u821e\u3044\u3092\u542b\u3080\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u7279\u5b9a\u3059\u308b\u3002\u305f\u3068\u3048\u3070\u3001\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u691c\u7d22 \u2013 \u30d5\u30eb\u30c6\u30ad\u30b9\u30c8\u300d\u306f\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u300d\u3068\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u300d\u3092\u542b\u3080\u3002<\/li>\n<li><strong>\u62e1\u5f35<\/strong>\uff1a\u8ffd\u52a0\u306e\u632f\u308b\u821e\u3044\u3092\u8ffd\u52a0\u3067\u304d\u308b\u3088\u3046\u306b\u62e1\u5f35\u53ef\u80fd\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u7279\u5b9a\u3059\u308b\u3002\u305f\u3068\u3048\u3070\u3001\u300c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u300d\u306f\u300c\u30d5\u30a9\u30eb\u30c0\u306e\u7ba1\u7406\u300d\u3092\u62e1\u5f35\u53ef\u80fd\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u62e1\u5f35\u30dd\u30a4\u30f3\u30c8<\/strong>\uff1a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u5185\u306e\u62e1\u5f35\u3092\u8ffd\u52a0\u3067\u304d\u308b\u7279\u5b9a\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u305f\u3068\u3048\u3070\u3001\u300c\u30e6\u30fc\u30b6\u30fc\u306e\u8ffd\u52a0\u300d\u306b\u306f\u300c\u4f1a\u793e\u306e\u8ffd\u52a0\u300d\u306e\u62e1\u5f35\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<h2>\u30d2\u30f3\u30c8\u3068\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n<h3>1. \u7c21\u5358\u306b\u4fdd\u3064<\/h3>\n<p dir=\"auto\">\u30b7\u30f3\u30d7\u30eb\u306a\u56f3\u304b\u3089\u59cb\u3081\u3001\u60c5\u5831\u3092\u96c6\u3081\u308b\u306b\u3064\u308c\u3066\u6bb5\u968e\u7684\u306b\u8a73\u7d30\u3092\u8ffd\u52a0\u3059\u308b\u3002\u3042\u307e\u308a\u591a\u304f\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3084\u95a2\u4fc2\u6027\u3067\u56f3\u3092\u8907\u96d1\u306b\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n<h3>2. \u8aac\u660e\u7684\u306a\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p dir=\"auto\">\u30a2\u30af\u30bf\u30fc\u304a\u3088\u3073\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u660e\u78ba\u3067\u8aac\u660e\u7684\u306a\u540d\u524d\u3092\u4ed8\u3051\u308b\u3053\u3068\u3067\u3001\u56f3\u3092\u7406\u89e3\u3057\u3084\u3059\u304f\u3059\u308b\u3002<\/p>\n<h3>3. \u6a5f\u80fd\u8981\u4ef6\u306b\u6ce8\u76ee\u3059\u308b<\/h3>\n<p dir=\"auto\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u8981\u4ef6\u306b\u7126\u70b9\u3092\u5f53\u3066\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u6280\u8853\u7684\u306a\u8a73\u7d30\u3084\u5b9f\u88c5\u306e\u5177\u4f53\u7684\u306a\u5185\u5bb9\u306f\u542b\u3081\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n<h3>4. \u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u3068\u691c\u8a3c\u3059\u308b<\/h3>\n<p dir=\"auto\">\u5b9a\u671f\u7684\u306b\u30b9\u30c6\u30fc\u30af\u30db\u30eb\u30c0\u30fc\u3068\u5354\u8b70\u3057\u3001\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u304c\u8981\u4ef6\u3092\u6b63\u78ba\u306b\u53cd\u6620\u3057\u3066\u3044\u308b\u304b\u691c\u8a3c\u3059\u308b\u3002<\/p>\n<h3>5. \u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p dir=\"auto\">\u4f7f\u7528\u3059\u308b<a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/tutorials\/use-case-diagram-tutorial\/\">Visual Paradigm \u306a\u3069\u306eUML\u30c4\u30fc\u30eb<\/a>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3\u3092\u4f5c\u6210\u304a\u3088\u3073\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u306f\u3001\u56f3\u306e\u4f5c\u6210\u3001\u7de8\u96c6\u3001\u5171\u6709\u3092\u7c21\u5358\u306b\u3067\u304d\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p dir=\"auto\"><a href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-use-case-diagram\/\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u56f3<\/a>\u306f<a 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