{"id":11341,"date":"2022-01-25T09:45:06","date_gmt":"2022-01-25T09:45:06","guid":{"rendered":"https:\/\/www.cybermedian.com\/fr\/uml-from-what-to-how-with-use-case-and-activity-diagram\/"},"modified":"2026-04-20T10:50:34","modified_gmt":"2026-04-20T10:50:34","slug":"uml-from-what-to-how-with-use-case-and-activity-diagram","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/fr\/project-management%e2%80%8a-%e2%80%8aplanning-phase-4-of-12%e2%80%8a-%e2%80%8astaffing-plan-36\/","title":{"rendered":"UML de ce qu&#8217;il faut faire \u00e0 comment le faire avec les diagrammes de cas d&#8217;utilisation et d&#8217;activit\u00e9"},"content":{"rendered":"<blockquote>\n<p><a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-use-case-diagram\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-use-case-diagram\/\" rel=\"noopener\" target=\"_blank\">Cas d&#8217;utilisation<\/a>montrent ce que votre syst\u00e8me doit faire. Les diagrammes d&#8217;activit\u00e9 vous permettent de pr\u00e9ciser comment votre syst\u00e8me atteindra ses objectifs.<\/p>\n<\/blockquote>\n<p>Les diagrammes d&#8217;activit\u00e9 sont parmi les plus accessibles<a data-href=\"https:\/\/www.visual-paradigm.com\/guide\" href=\"https:\/\/www.visual-paradigm.com\/guide\" rel=\"noopener\" target=\"_blank\">Diagrammes UML<\/a>car ils utilisent des symboles similaires \u00e0 la notation de diagramme de flux largement connue ; par cons\u00e9quent, ils sont utiles pour d\u00e9crire des processus \u00e0 un large public. En effet, les diagrammes d&#8217;activit\u00e9 trouvent leurs origines dans les diagrammes de flux, ainsi que dans<a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-state-machine-diagram\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-state-machine-diagram\/\" rel=\"noopener\" target=\"_blank\">Diagrammes d&#8217;\u00e9tat UML<\/a>,\u00a0<a data-href=\"http:\/\/What is Data Flow Diagram?\" href=\"http:\/\/What%20is%20Data%20Flow%20Diagram?\" rel=\"noopener\" target=\"_blank\">Diagrammes de flux de donn\u00e9es<\/a>, et les r\u00e9seaux de Petri.<\/p>\n<p>Les diagrammes d&#8217;activit\u00e9 montrent des actions de haut niveau encha\u00een\u00e9es pour repr\u00e9senter un processus se produisant dans votre syst\u00e8me. Les diagrammes d&#8217;activit\u00e9 sont particuli\u00e8rement efficaces pour mod\u00e9liser les processus m\u00e9tier.<\/p>\n<p>Un processus m\u00e9tier est un ensemble de t\u00e2ches coordonn\u00e9es visant \u00e0 atteindre un objectif commercial, comme l&#8217;exp\u00e9dition des commandes des clients. Certains outils de gestion des processus m\u00e9tiers (BPM) vous permettent de d\u00e9finir des processus m\u00e9tiers \u00e0 l&#8217;aide de diagrammes d&#8217;activit\u00e9, ou d&#8217;une notation graphique similaire (comme<a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/bpmn\/what-is-bpmn\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/bpmn\/what-is-bpmn\/\" rel=\"noopener\" target=\"_blank\">BPMN<\/a>), puis de les ex\u00e9cuter. Cela vous permet de d\u00e9finir et d&#8217;ex\u00e9cuter, par exemple, un processus d&#8217;approbation de paiement o\u00f9 l&#8217;une des \u00e9tapes appelle un service web d&#8217;approbation de carte de cr\u00e9dit \u00e0 l&#8217;aide d&#8217;une notation graphique simple comme les diagrammes d&#8217;activit\u00e9.<\/p>\n<p>Par exemple, vous pouvez utiliser un<a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-activity-diagram\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-activity-diagram\/\" rel=\"noopener\" target=\"_blank\">diagramme d&#8217;activit\u00e9<\/a>pour mod\u00e9liser les \u00e9tapes impliqu\u00e9es dans la cr\u00e9ation d&#8217;un compte de blog.<\/p>\n<figure><img alt=\"\" data-height=\"724\" data-image-id=\"1*opfsC9KKOOQ0TMuAALLX1w.png\" data-is-featured=\"true\" data-width=\"839\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2022\/02\/1opfsC9KKOOQ0TMuAALLX1w.png\"\/><\/figure>\n<p>Examinons les \u00e9l\u00e9ments de base des diagrammes d&#8217;activit\u00e9 en mod\u00e9lisant les \u00e9tapes du cas d&#8217;utilisation de cr\u00e9ation d&#8217;un compte de blog. Le tableau suivant contient la description du cas d&#8217;utilisation Cr\u00e9er un nouveau compte de blog. Les sections Flux principal et Extension d\u00e9crivent les \u00e9tapes du processus de cr\u00e9ation d&#8217;un compte de blog.<\/p>\n<figure><img alt=\"\" data-height=\"573\" data-image-id=\"1*OFIrmrJ1r6hDxQjVteDujA.png\" data-width=\"689\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2022\/02\/1OFIrmrJ1r6hDxQjVteDujA.png\"\/><\/figure>\n<p>Examinons maintenant le cas d&#8217;utilisation (du besoin \u2014 ce qu&#8217;il faut faire \u2014 au flux logique de haut niveau \u2014 comment) \u00e0 l&#8217;aide d&#8217;un diagramme d&#8217;activit\u00e9 :<\/p>\n<figure><img alt=\"\" data-height=\"799\" data-image-id=\"1*M1fu6mObzLF9pyIA9gmnhg.png\" data-width=\"429\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2022\/02\/1M1fu6mObzLF9pyIA9gmnhg.png\"\/><\/figure>\n<p>Entre le n\u0153ud initial et le n\u0153ud final d&#8217;activit\u00e9 se trouvent les actions, repr\u00e9sent\u00e9es par des rectangles arrondis. Les actions sont les \u00e9tapes importantes qui ont lieu dans l&#8217;activit\u00e9 globale, par exemple : S\u00e9lectionner le type de compte, Saisir les informations de l&#8217;auteur, etc. Une action peut \u00eatre un comportement ex\u00e9cut\u00e9, un calcul ou toute \u00e9tape cl\u00e9 du processus.<\/p>\n<p>Le flux de l&#8217;activit\u00e9 est repr\u00e9sent\u00e9 \u00e0 l&#8217;aide de lignes fl\u00e9ch\u00e9es appel\u00e9es ar\u00eates ou chemins. La fl\u00e8che sur une ar\u00eate d&#8217;activit\u00e9 indique la direction du flux d&#8217;une action \u00e0 la suivante. Une ligne entrant dans un n\u0153ud est appel\u00e9e ar\u00eate entrante, et une ligne sortant d&#8217;un n\u0153ud est appel\u00e9e ar\u00eate sortante. Les ar\u00eates relient les actions pour d\u00e9terminer le flux global de l&#8217;activit\u00e9 : tout d&#8217;abord, le n\u0153ud initial devient actif, puis le premier n\u0153ud en forme de losange est appel\u00e9 d\u00e9cision, analogue \u00e0 une instruction if-else dans un code.<\/p>\n<p>Remarquez qu&#8217;il y a deux ar\u00eates sortantes de la d\u00e9cision dans la figure ci-dessus, chacune \u00e9tiquet\u00e9e avec des conditions bool\u00e9ennes. Une seule ar\u00eate est suivie \u00e0 partir du n\u0153ud de d\u00e9cision, selon que l&#8217;auteur est autoris\u00e9 ou non. Le second n\u0153ud en forme de losange est appel\u00e9 fusion. Un n\u0153ud de fusion combine les ar\u00eates partant d&#8217;un n\u0153ud de d\u00e9cision, marquant la fin du comportement conditionnel.<\/p>\n<p><strong>Autres articles connexes<\/strong><\/p>\n<ul>\n<li><a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-use-case-diagram\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-use-case-diagram\/\" rel=\"noopener\" target=\"_blank\">Qu&#8217;est-ce qu&#8217;un diagramme de cas d&#8217;utilisation ?<\/a><\/li>\n<li><a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/agile-software-development\/user-story-vs-use-case\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/agile-software-development\/user-story-vs-use-case\/\" rel=\"noopener\" target=\"_blank\">User Story vs cas d&#8217;utilisation pour le d\u00e9veloppement logiciel agile<\/a><\/li>\n<li><a data-href=\"https:\/\/www.visual-paradigm.com\/guide\/use-case\/what-is-use-case-specification\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/use-case\/what-is-use-case-specification\/\" rel=\"noopener\" target=\"_blank\">Qu&#8217;est-ce qu&#8217;une sp\u00e9cification de cas d&#8217;utilisation ?<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Use cases\u00a0show what your system should do. Activity diagrams allow you to specify how your system will accomplish its goals. Activity diagrams show high-level actions chained together to represent a process occurring in your system. Activity diagrams are particularly good at modeling business processes or elaborating a use case. This article shows you how to do so.<\/p>\n","protected":false},"author":1,"featured_media":11342,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[3],"tags":[52,63,67,62,68,53,4],"class_list":["post-11341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-cn-done","tag-es-done","tag-fr-done","tag-ja-done","tag-ru-done","tag-tw-done","tag-unified-modeling-language"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>UML de ce qu&#039;il faut faire \u00e0 comment le faire avec les diagrammes de cas d&#039;utilisation et d&#039;activit\u00e9 - Cyberm\u00e9diane<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cybermedian.com\/fr\/uml-from-what-to-how-with-use-case-and-activity-diagram\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"UML de ce qu&#039;il faut faire \u00e0 comment le faire avec les diagrammes de cas d&#039;utilisation et d&#039;activit\u00e9 - Cyberm\u00e9diane\" \/>\n<meta property=\"og:description\" content=\"Use cases\u00a0show what your system should do. 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