{"id":11280,"date":"2026-03-18T15:54:25","date_gmt":"2026-03-18T07:54:25","guid":{"rendered":"https:\/\/www.archimetric.com\/ja\/mastering-activity-diagrams-in-uml\/"},"modified":"2026-03-18T15:54:25","modified_gmt":"2026-03-18T07:54:25","slug":"mastering-activity-diagrams-in-uml","status":"publish","type":"post","link":"https:\/\/www.archimetric.com\/ja\/mastering-activity-diagrams-in-uml\/","title":{"rendered":"UML\u306b\u304a\u3051\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u7fd2\u5f97"},"content":{"rendered":"<h2>\ud83c\udfaf \u65c5\u306e\u59cb\u307e\u308a\uff1a\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u3068\u306f\u4f55\u304b\uff1f<\/h2>\n<p>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306b\u95a2\u3059\u308b\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9\u3078\u3088\u3046\u3053\u305d\uff01\u3053\u308c\u306f\u3001UML\uff08\u7d71\u5408\u30e2\u30c7\u30eb\u5316\u8a00\u8a9e\uff09\u306b\u304a\u3051\u308b\u6700\u3082\u5f37\u529b\u306a\u884c\u52d5\u56f3\u306e\u4e00\u3064\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><img alt=\"What is Activity Diagram?\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/what-is-activity-diagram.png\"\/><\/p>\n<p>An\u00a0<strong>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3<\/strong>\u00a0\u306f\u3001\u4e00\u3064\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u304b\u3089\u5225\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3078\u306e\u6d41\u308c\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u3001\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\u306e\u9ad8\u5ea6\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u52d5\u7684\u5074\u9762\u3092\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u91cd\u8981\u306a\u884c\u52d5\u56f3\u3067\u3059\u3002<\/p>\n<p><img alt=\"Activity Diagram in UML Diagram Hierarchy\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/01-activity-diagram-in-uml-diagram-hierarchy.png\"\/><\/p>\n<h3>\u7b2c\u4e00\u6b69\uff1a\u57fa\u672c\u3092\u7406\u89e3\u3059\u308b<\/h3>\n<p>\u65c5\u3092\u59cb\u3081\u308b\u969b\u306b\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u3092\u4e0a\u304b\u3089\u898b\u3066\u3044\u308b\u3068\u60f3\u50cf\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u3092\u53ef\u8996\u5316\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u9806\u6b21\u30ef\u30fc\u30af\u30d5\u30ed\u30fc<\/strong>\u00a0\u2013 \u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u30d7\u30ed\u30bb\u30b9<\/p>\n<\/li>\n<li>\n<p><strong>\u4e26\u5217\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3<\/strong>\u00a0\u2013 \u540c\u6642\u306b\u9032\u884c\u3059\u308b\u30bf\u30b9\u30af<\/p>\n<\/li>\n<li>\n<p><strong>\u6c7a\u5b9a\u30dd\u30a4\u30f3\u30c8<\/strong>\u00a0\u2013 \u9078\u629e\u304c\u5c06\u6765\u306e\u9053\u3092\u6c7a\u5b9a\u3059\u308b\u5834\u6240<\/p>\n<\/li>\n<li>\n<p><strong>\u8907\u96d1\u306a\u30d3\u30b8\u30cd\u30b9\u30d7\u30ed\u30bb\u30b9<\/strong>\u00a0\u2013 \u7570\u306a\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u9023\u643a\u3059\u308b\u304b<\/p>\n<\/li>\n<\/ul>\n<hr\/>\n<h2>\ud83d\uddfa\ufe0f \u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306f\u3044\u3064\u4f7f\u3046\u3079\u304d\u304b\uff1f<\/h2>\n<p>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u610f\u5473\u3092\u7406\u89e3\u3057\u305f\u306e\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u306b\u304a\u3044\u3066\u305d\u308c\u304c\u6700\u3082\u5f79\u7acb\u3064\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306f\u3001\u7570\u306a\u308b\u62bd\u8c61\u5ea6\u306e\u30ec\u30d9\u30eb\u3067\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u306b\u3001\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u304c\u3069\u306e\u3088\u3046\u306b\u8abf\u6574\u3055\u308c\u308b\u304b\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u72b6\u6cc1\u3067\u306f\u3001\u975e\u5e38\u306b\u4fa1\u5024\u3042\u308b\u3082\u306e\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<h3>1.\u00a0<strong>\u5019\u88dc\u3068\u306a\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u7279\u5b9a<\/strong><\/h3>\n<p>\u30d3\u30b8\u30cd\u30b9\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u691c\u8a0e\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u6f5c\u5728\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u767a\u898b\u3057\u307e\u3059\u3002<\/p>\n<h3>2.\u00a0<strong>\u6587\u8108\u306e\u5b9a\u7fa9<\/strong><\/h3>\n<p>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u4e8b\u524d\u6761\u4ef6\u3068\u4e8b\u5f8c\u6761\u4ef6\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h3>3.\u00a0<strong>\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306e\u30e2\u30c7\u30ea\u30f3\u30b0<\/strong><\/h3>\n<p>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u9593\u304a\u3088\u3073\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u5185\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u53ef\u8996\u5316\u3057\u307e\u3059\u3002<\/p>\n<h3>4.\u00a0<strong>\u8907\u96d1\u306a\u64cd\u4f5c\u306e\u51e6\u7406<\/strong><\/h3>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4e0a\u306e\u64cd\u4f5c\u306b\u304a\u3051\u308b\u8907\u96d1\u306a\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u3002<\/p>\n<h3>5.\u00a0<strong>\u30cf\u30a4\u30ec\u30d9\u30eb\u306a\u6d3b\u52d5\u306e\u8a73\u7d30\u5316<\/strong><\/h3>\n<p>\u8907\u96d1\u306a\u6d3b\u52d5\u3092\u3001\u8a73\u7d30\u306a\u30cf\u30a4\u30ec\u30d9\u30eb\u306a\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306b\u5206\u89e3\u3059\u308b\u3002<\/p>\n<p><strong>\u4ee5\u4e0b\u306e\u7528\u9014\u306b\u6700\u9069\uff1a<\/strong>\u6d3b\u52d5\u304c\u91cd\u8907\u3057\u3001\u8abf\u6574\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u307e\u305f\u306f\u8907\u6570\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304c\u9023\u643a\u3057\u3066\u30d3\u30b8\u30cd\u30b9\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u8868\u73fe\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3002<\/p>\n<hr\/>\n<h2>\ud83c\udf93 \u4f8b\u306b\u3088\u308b\u5b66\u7fd2\uff1a\u5b9f\u8df5\u7684\u306a\u5b66\u3073\u306e\u65c5<\/h2>\n<p>\u7406\u8ad6\u306f\u91cd\u8981\u3060\u304c\u3001\u73fe\u5b9f\u306e\u4f8b\u3092\u901a\u3058\u305f\u5b66\u7fd2\u306b\u52dd\u308b\u3082\u306e\u306f\u4f55\u3082\u306a\u3044\u3002\u5b9f\u969b\u306e\u30b7\u30ca\u30ea\u30aa\u30923\u3064\u78ba\u8a8d\u3057\u3088\u3046\u3002<\/p>\n<h3>\u4f8b1\uff1a\u30ef\u30fc\u30c9\u30d7\u30ed\u30bb\u30c3\u30b5\u306e\u30e2\u30c7\u30eb\u5316<\/h3>\n<p><img alt=\"Basic Activity Diagram\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/02-basic-activity-diagram.png\"\/><\/p>\n<p><strong>\u3042\u306a\u305f\u306e\u65c5\uff1a<\/strong>\u30ef\u30fc\u30c9\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3057\u3066\u3044\u308b\u3068\u60f3\u50cf\u3057\u3066\u307f\u3088\u3046\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u4f5c\u6210\u3059\u308b\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3060\uff1a<\/p>\n<p><strong>\u30d7\u30ed\u30bb\u30b9\u30d5\u30ed\u30fc\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u30ef\u30fc\u30c9\u51e6\u7406\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u958b\u304f<\/p>\n<\/li>\n<li>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u3067\u4e00\u610f\u306e\u540d\u524d\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u4fdd\u5b58\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u5165\u529b\u3059\u308b<\/p>\n<\/li>\n<li>\n<p><strong>\u610f\u601d\u6c7a\u5b9a\u30dd\u30a4\u30f3\u30c8\uff1a<\/strong>\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 \u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u958b\u304f \u2192 \u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u4f5c\u6210\u3059\u308b \u2192 \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8cbc\u308a\u4ed8\u3051\u308b<\/p>\n<\/li>\n<li>\n<p><strong>\u610f\u601d\u6c7a\u5b9a\u30dd\u30a4\u30f3\u30c8\uff1a<\/strong>\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 \u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u958b\u304f \u2192 \u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u3092\u4f5c\u6210\u3059\u308b \u2192 \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8cbc\u308a\u4ed8\u3051\u308b<\/p>\n<\/li>\n<li>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u4fdd\u5b58\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30cf\u30fc\u30c9\u30b3\u30d4\u30fc\u3092\u5370\u5237\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u30ef\u30fc\u30c9\u51e6\u7406\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u7d42\u4e86\u3059\u308b<\/p>\n<\/li>\n<\/ol>\n<p><img alt=\"Activity Diagram Example - Word Processor\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/03-activity-diagram-word-processor-example.png\"\/><\/p>\n<p><strong>\u5b66\u3073\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/strong>\u3053\u306e\u4f8b\u306f\u3001\u8eab\u8fd1\u306a\u6587\u8108\u306b\u304a\u3051\u308b\u6761\u4ef6\u5206\u5c90\u3068\u9806\u6b21\u7684\u306a\u6d3b\u52d5\u3092\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n<hr\/>\n<h3>\u4f8b2\uff1a\u6ce8\u6587\u306e\u51e6\u7406<\/h3>\n<p><strong>\u3042\u306a\u305f\u306e\u8ab2\u984c\uff1a<\/strong>\u4e26\u884c\u3059\u308b\u6d3b\u52d5\u3092\u5099\u3048\u305f\u8907\u96d1\u306a\u6ce8\u6587\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u3002<\/p>\n<p><strong>\u30b7\u30ca\u30ea\u30aa\uff1a<\/strong><br \/>\n\u6ce8\u6587\u3092\u53d7\u3051\u53d6\u308b\u3068\u3001\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306f2\u3064\u306e\u6d41\u308c\u306b\u5206\u304b\u308c\u308b<strong>\u4e26\u5217<\/strong>\u00a0\u6d3b\u52d5\u306e\u30bb\u30c3\u30c8\uff1a<\/p>\n<ul>\n<li>\n<p><strong>A\u5074\uff1a<\/strong>\u00a0\u6ce8\u6587\u3092\u8a18\u5165\u3057\u3066\u9001\u4fe1\u3059\u308b<\/p>\n<\/li>\n<li>\n<p><strong>B\u5074\uff1a<\/strong>\u00a0\u8acb\u6c42\u51e6\u7406\u3092\u884c\u3046<\/p>\n<\/li>\n<\/ul>\n<p><strong>\u8907\u96d1\u3055\uff1a<\/strong><br \/>\n\u6ce8\u6587\u5165\u529b\u5074\u3067\u306f\u3001<strong>\u6761\u4ef6\u4ed8\u304d\u306e\u5224\u65ad<\/strong>:<\/p>\n<ul>\n<li>\n<p>\u7fcc\u65e5\u914d\u9001\u306e\u5834\u5408 \u2192 \u7fcc\u65e5\u914d\u9001\u306e\u51e6\u7406\u3092\u5b9f\u884c<\/p>\n<\/li>\n<li>\n<p>\u901a\u5e38\u914d\u9001\u306e\u5834\u5408 \u2192 \u901a\u5e38\u914d\u9001\u306e\u51e6\u7406\u3092\u5b9f\u884c<\/p>\n<\/li>\n<\/ul>\n<p><strong>\u89e3\u6c7a\u7b56\uff1a<\/strong><br \/>\n\u6700\u5f8c\u306b\u3001\u4e26\u5217\u51e6\u7406\u304c<strong>\u7d71\u5408<\/strong>\u00a0\u6ce8\u6587\u3092\u5b8c\u4e86\u3055\u305b\u308b\u3002<\/p>\n<p><img alt=\"Activity Diagram - Process Order\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/04-activity-diagram-example-process-order.png\"\/><\/p>\n<p><strong>\u5b66\u3079\u308b\u3053\u3068\uff1a<\/strong>\u00a0\u3053\u308c\u306b\u3088\u308a\u3001<strong>\u5206\u5c90\u30ce\u30fc\u30c9<\/strong>\u00a0\uff08\u4e26\u5217\u51e6\u7406\u306b\u5206\u5c90\u3059\u308b\uff09\u304a\u3088\u3073<strong>\u7d50\u5408\u30ce\u30fc\u30c9<\/strong>\u00a0\uff08\u4e26\u5217\u51e6\u7406\u3092\u518d\u3073\u7d71\u5408\u3059\u308b\uff09\u3001\u304a\u3088\u3073\u6761\u4ef6\u4ed8\u304d\u5224\u65ad\u304c\u793a\u3055\u308c\u308b\u3002<\/p>\n<hr\/>\n<h3>\u4f8b3\uff1a\u5b66\u751f\u767b\u9332\u30b7\u30b9\u30c6\u30e0<\/h3>\n<p><strong>\u3042\u306a\u305f\u306e\u30df\u30c3\u30b7\u30e7\u30f3\uff1a<\/strong>\u00a0\u5927\u5b66\u306e\u767b\u9332\u30d7\u30ed\u30bb\u30b9\u3092\u56f3\u793a\u3059\u308b\u3002<\/p>\n<p><strong>\u65c5\u306e\u9053\u306e\u308a\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u5fdc\u52df\u8005\u304c\u5927\u5b66\u306b\u767b\u9332\u3057\u305f\u3044<\/p>\n<\/li>\n<li>\n<p>\u5fdc\u52df\u8005\u304c\u8a18\u5165\u6e08\u307f\u306e\u767b\u9332\u30d5\u30a9\u30fc\u30e0\u3092\u63d0\u51fa\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u52d9\u62c5\u5f53\u8005\u304c\u30d5\u30a9\u30fc\u30e0\u3092\u78ba\u8a8d\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u52d9\u62c5\u5f53\u8005\u304c\u30d5\u30a9\u30fc\u30e0\u304c\u9069\u5207\u306b\u8a18\u5165\u3055\u308c\u3066\u3044\u308b\u3068\u5224\u65ad\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u52d9\u5c40\u306f\u3001\u5b66\u751f\u306b\u5927\u5b66\u6982\u8981\u8aac\u660e\u4f1a\u306b\u51fa\u5e2d\u3059\u308b\u3088\u3046\u901a\u77e5\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u52d9\u5c40\u306f\u3001\u5b66\u751f\u304c\u30bb\u30df\u30ca\u30fc\u306b\u767b\u9332\u3059\u308b\u306e\u3092\u652f\u63f4\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u52d9\u5c40\u306f\u3001\u5b66\u751f\u306b\u521d\u671f\u6388\u696d\u6599\u306e\u652f\u6255\u3044\u3092\u4f9d\u983c\u3059\u308b<\/p>\n<\/li>\n<\/ol>\n<p><img alt=\"Activity Diagram - Student Enrollment\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/05-activity-diagram-example-student-enrollment.png\"\/><\/p>\n<p><strong>\u5b66\u3079\u308b\u3053\u3068\uff1a<\/strong>\u3053\u308c\u306f\u3001\u5358\u4e00\u306e\u30a2\u30af\u30bf\u30fc\uff08\u4e8b\u52d9\u5c40\uff09\u304c\u9806\u6b21\u8907\u6570\u306e\u6d3b\u52d5\u3092\u5b9f\u884c\u3059\u308b\u660e\u78ba\u3067\u7dda\u5f62\u7684\u306a\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n<hr\/>\n<h2>\ud83c\udfca \u30ec\u30d9\u30eb\u30a2\u30c3\u30d7\u306e\u6982\u5ff5\uff1a\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3<\/h2>\n<p>\u3042\u306a\u305f\u306e\u5b66\u3073\u304c\u9032\u3080\u306b\u3064\u308c\u3066\u3001\u8907\u6570\u306e\u30a2\u30af\u30bf\u30fc\u3092\u542b\u3080\u3088\u308a\u8907\u96d1\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u76f4\u9762\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u304c\u00a0<strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3<\/strong>\u00a0\u5fc5\u8981\u4e0d\u53ef\u6b20\u306b\u306a\u308b\u5834\u9762\u3067\u3059\u3002<\/p>\n<h3>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u3068\u306f\u4f55\u304b\uff1f<\/h3>\n<p>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u3068\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3067\u3042\u308b\uff1a<\/p>\n<ul>\n<li>\n<p>\u540c\u3058\u30a2\u30af\u30bf\u30fc\u304c\u5b9f\u884c\u3059\u308b\u6d3b\u52d5\u3092\u00a0<strong>\u540c\u3058\u30a2\u30af\u30bf\u30fc<\/strong>\u00a0\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u4e0a\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u5358\u4e00\u306e\u30b9\u30ec\u30c3\u30c9\u5185\u306e\u6d3b\u52d5\u3092\u00a0<strong>\u5358\u4e00\u306e\u30b9\u30ec\u30c3\u30c9<\/strong><\/p>\n<\/li>\n<\/ul>\n<h3>\u4f8b\uff1a\u8077\u54e1\u7d4c\u8cbb\u306e\u63d0\u51fa<\/h3>\n<p><img alt=\"Activity Diagram - Use of Swimlane\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/06-use-of-swimlane-in-activity-diagram.png\"\/><\/p>\n<p><strong>\u9055\u3044\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/strong><\/p>\n<p><strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u306a\u3057\uff1a<\/strong><br \/>\n<img alt=\"Activity Diagram (Without Swimlane)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/07-activity-diagram-without-swimlane-version.png\"\/><\/p>\n<p><strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u3042\u308a\uff1a<\/strong><br \/>\n<img alt=\"Activity Diagram (With Swimlane)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/08-activity-diagram-with-swimlane-version.png\"\/><\/p>\n<p><strong>\u5f97\u3089\u308c\u308b\u3082\u306e\uff1a<\/strong>\u00a0\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u306b\u3088\u308a\u3001\u30d7\u30ed\u30bb\u30b9\u306b\u304a\u3051\u308b\u00a0<strong>\u8ab0\u304c\u4f55\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u304b<\/strong>\u00a0\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u3068\u8cac\u4efb\u306e\u6240\u5728\u304c\u5411\u4e0a\u3059\u308b\u3002<\/p>\n<hr\/>\n<h2>\ud83d\udcda \u3042\u306a\u305f\u306e\u8996\u899a\u8f9e\u66f8\uff1a\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u8a18\u6cd5<\/h2>\n<p>\u3053\u308c\u3089\u306e\u91cd\u8981\u306a\u8a18\u53f7\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u8a00\u8a9e\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8a18\u6cd5<\/th>\n<th>\u8aac\u660e<\/th>\n<th>\u8a18\u53f7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3<\/strong><\/td>\n<td>\u4e00\u9023\u306e\u30a2\u30af\u30b7\u30e7\u30f3<\/td>\n<td><img alt=\"Activity\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/09-activity-diagram-notation-activity.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30a2\u30af\u30b7\u30e7\u30f3<\/strong><\/td>\n<td>\u5b9f\u884c\u3055\u308c\u308b\u30bf\u30b9\u30af<\/td>\n<td><img alt=\"Action\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/10-activity-diagram-notation-action.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u5236\u5fa1\u30d5\u30ed\u30fc<\/strong><\/td>\n<td>\u5b9f\u884c\u306e\u9806\u5e8f\u3092\u793a\u3059<\/td>\n<td><img alt=\"Control Flow\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/11-activity-diagram-notation-control-flow.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30ed\u30fc<\/strong><\/td>\n<td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c1\u3064\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u304b\u3089\u5225\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3078\u6d41\u308c\u308b\u69d8\u5b50\u3092\u793a\u3059<\/td>\n<td><img alt=\"Object Flow\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/12-activity-diagram-notation-object-flow.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u521d\u671f\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u958b\u59cb<\/td>\n<td><img alt=\"Initial Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/13-activity-diagram-notation-initial-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u7d42\u4e86\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u3059\u3079\u3066\u306e\u5236\u5fa1\u30d5\u30ed\u30fc\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30ed\u30fc\u3092\u505c\u6b62\u3059\u308b<\/td>\n<td><img alt=\"Final Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/14-activity-diagram-notation-activity-final-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30ed\u30fc\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8868\u3059<\/td>\n<td><img alt=\"Object Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/15-activity-diagram-notation-object-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u6c7a\u5b9a\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u7d4c\u8def\u9078\u629e\u306e\u305f\u3081\u306e\u6761\u4ef6\u30c6\u30b9\u30c8<\/td>\n<td><img alt=\"Decision Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/16-activity-diagram-notation-decision-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30de\u30fc\u30b8\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u7570\u306a\u308b\u6c7a\u5b9a\u7d4c\u8def\u3092\u7d71\u5408\u3059\u308b<\/td>\n<td><img alt=\"Merge Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/17-activity-diagram-notation-merge-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30d5\u30a9\u30fc\u30af\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u4e26\u884c\uff0f\u540c\u6642\u30d5\u30ed\u30fc\u306b\u5206\u5c90\u3059\u308b<\/td>\n<td><img alt=\"Fork Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/18-activity-diagram-notation-fork-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b8\u30e7\u30a4\u30f3\u30ce\u30fc\u30c9<\/strong><\/td>\n<td>\u4e26\u884c\uff0f\u540c\u6642\u30d5\u30ed\u30fc\u3092\u7d71\u5408\u3059\u308b<\/td>\n<td><img alt=\"Join Node\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/19-activity-diagram-notation-join-node.png\"\/><\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\uff0f\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3<\/strong><\/td>\n<td>\u30a2\u30af\u30bf\u30fc\u307e\u305f\u306f\u30b9\u30ec\u30c3\u30c9\u3054\u3068\u306b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b<\/td>\n<td><img alt=\"Swimlane\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2026\/03\/20-activity-diagram-notation-swimlane-and-partition.png\"\/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr\/>\n<h2>\ud83d\ude80 \u81ea\u5206\u3060\u3051\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u3092\u4f5c\u6210\u3059\u308b\u6e96\u5099\u306f\u3067\u304d\u307e\u3057\u305f\u304b\uff1f<\/h2>\n<p>\u5b66\u7fd2\u306e\u65c5\u3092\u7d42\u3048\u307e\u3057\u305f\uff01\u3055\u3042\u3001\u5b66\u3093\u3060\u3053\u3068\u3092\u5b9f\u969b\u306b\u6d3b\u7528\u3059\u308b\u6642\u3067\u3059\u3002<\/p>\n<p><strong>\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>Visual Paradigm Community Edition\uff08\u7121\u6599\u306eUML\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\uff09\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b<\/p>\n<\/li>\n<li>\n<p>\u81ea\u5206\u3060\u3051\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u3092\u4f5c\u6210\u3057\u59cb\u3081\u308b<\/p>\n<\/li>\n<li>\n<p>\u4ed5\u4e8b\u3084\u5b66\u7fd2\u3067\u5b9f\u969b\u306b\u906d\u9047\u3059\u308b\u72b6\u6cc1\u3092\u984c\u6750\u306b\u7df4\u7fd2\u3059\u308b<\/p>\n<\/li>\n<\/ol>\n<p><strong>\u59cb\u3081\u307e\u3057\u3087\u3046\uff1a<\/strong>\u00a0<a href=\"https:\/\/www.visual-paradigm.com\/download\/community.jsp\">\u7121\u6599\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/a><\/p>\n<hr\/>\n<h2>\ud83d\udcd6 \u53c2\u8003\u6587\u732e\u30ea\u30b9\u30c8<\/h2>\n<ol>\n<li>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-activity-diagram\/\"><strong>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u3068\u306f\u4f55\u304b\uff1f\uff5cVisual Paradigm\u306b\u3088\u308bUML\u30ac\u30a4\u30c9<\/strong><\/a>\uff1a\u3053\u306e\u8a73\u7d30\u306a\u8aac\u660e\u3067\u306f\u3001<strong>\u76ee\u7684\u3001\u69cb\u6210\u8981\u7d20\u3001\u4f7f\u7528\u4f8b<\/strong>\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u304c\u30b7\u30b9\u30c6\u30e0\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u304a\u3088\u3073\u30d3\u30b8\u30cd\u30b9\u30d7\u30ed\u30bb\u30b9\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u3069\u306e\u3088\u3046\u306b\u4f7f\u7528\u3055\u308c\u308b\u304b\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><a 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href=\"https:\/\/online.visual-paradigm.com\/diagrams\/solutions\/free-activity-diagram-tool\/\"><strong>\u7121\u6599\u30aa\u30f3\u30e9\u30a4\u30f3\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u30c4\u30fc\u30eb<\/strong><\/a>\uff1a\u3053\u306e\u30ea\u30bd\u30fc\u30b9\u3067\u306f\u3001<strong>\u30a6\u30a7\u30d6\u30d9\u30fc\u30b9\u306e\u30c4\u30fc\u30eb<\/strong>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u4e0d\u8981\u3067\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u56f3\u3092\u63cf\u304f\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3067\u3001\u30c7\u30b6\u30a4\u30ca\u30fc\u304c\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u53ef\u8996\u5316\u3059\u308b\u306e\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/learning\/handbooks\/software-design-handbook\/activity-diagram.jsp\"><strong>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u8a2d\u8a08\u306b\u304a\u3051\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\uff5cVisual 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href=\"https:\/\/www.diagrams-ai.com\/blog\/mastering-uml-activity-diagrams-ai-visual-paradigm\/\"><strong>AI\u3092\u6d3b\u7528\u3057\u305fUML\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u7fd2\u5f97<\/strong><\/a>\uff1a\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001<strong>AI\u3092\u6d3b\u7528\u3057\u305f\u6a5f\u80fd<\/strong>\u958b\u767a\u8005\u3084\u30a2\u30ca\u30ea\u30b9\u30c8\u304cUML\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u306e\u4f5c\u6210\u3068\u6700\u9069\u5316\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b9\u6cd5\u3092\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.cybermedian.com\/mastering-swimlane-activity-diagrams-a-practical-guide-with-examples\"><strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u6d3b\u52d5\u56f3\u306e\u7fd2\u5f97\uff1a\u5b9f\u8df5\u30ac\u30a4\u30c9<\/strong><\/a>\uff1a\u73fe\u5b9f\u306e\u4f8b\u3092\u7528\u3044\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30d7\u30ed\u30bb\u30b9\u3092\u53ef\u8996\u5316\u3059\u308b\u306e\u3092\u652f\u63f4\u3059\u308b\u5b9f\u8df5\u30ac\u30a4\u30c9<strong>\u7570\u306a\u308b\u5f79\u5272\u3084\u90e8\u9580\u9593\u306e\u30ef\u30fc\u30af\u30d5\u30ed\u30fc<\/strong>\u30b9\u30a4\u30e0\u30ec\u30fc\u30f3\u3092\u901a\u3058\u3066\u3002<\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.archimetric.com\/comprehensive-tutorial-using-visual-paradigms-ai-powered-use-case-to-activity-diagram-tool\/\"><strong>AI\u642d\u8f09\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304b\u3089\u6d3b\u52d5\u56f3\u3078\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/strong><\/a>\uff1aAI\u6a5f\u80fd\u304c\u3069\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u304b\u3092\u793a\u3059\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<strong>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306e\u8a18\u8ff0\u3092\u81ea\u52d5\u7684\u306b\u5909\u63db<\/strong>\u8a73\u7d30\u306a\u6d3b\u52d5\u56f3\u306b\u5909\u63db\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u5206\u6790\u3092\u3088\u308a\u826f\u304f\u3059\u308b\u305f\u3081\u3002<\/p>\n<\/li>\n<li>\n<p class=\"\"><a href=\"https:\/\/www.cybermedian.com\/comprehensive-guide-to-uml-activity-diagrams\/\"><strong>UML\u6d3b\u52d5\u56f3\u306e\u5305\u62ec\u7684\u30ac\u30a4\u30c9 \u2013 Cybermedian<\/strong><\/a>\uff1a\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Visual Paradigm\u304c\u3069\u306e\u3088\u3046\u306b\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u304b\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059<strong>UML\u6d3b\u52d5\u56f3\u306e\u3059\u3079\u3066\u306e\u30bf\u30a4\u30d7<\/strong>\u30d7\u30ed\u30bb\u30b9\u6587\u66f8\u306e\u660e\u78ba\u3055\u3068\u95a2\u4e0e\u5ea6\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u3002<\/p>\n<\/li>\n<\/ol>\n<hr\/>\n<p><strong>\u5b66\u3073\u306e\u65c5\u3092\u7d9a\u3051\u307e\u3057\u3087\u3046\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-uml\/\">\u7d71\u5408\u30e2\u30c7\u30eb\u5316\u8a00\u8a9e\u3068\u306f\u4f55\u304b\uff1f<\/a><\/p>\n<\/li>\n<li>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/features\/uml-tool\/\">\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306aUML\u30c4\u30fc\u30eb<\/a><\/p>\n<\/li>\n<\/ol>\n<p class=\"\"><em>\u697d\u3057\u3044\u56f3\u793a\u3092\uff01 \ud83c\udfa8<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83c\udfaf \u65c5\u306e\u59cb\u307e\u308a\uff1a\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u56f3\u3068\u306f\u4f55\u304b<\/p>\n","protected":false},"author":3482,"featured_media":11281,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","fifu_image_url":"https:\/\/cdn-images.visual-paradigm.com\/guide\/uml\/what-is-activity-diagram\/08-activity-diagram-with-swimlane-version.png","fifu_image_alt":"","footnotes":""},"categories":[127],"tags":[],"class_list":["post-11280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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