{"id":34208,"date":"2023-05-12T09:13:13","date_gmt":"2023-05-12T07:13:13","guid":{"rendered":"https:\/\/cesam.community\/2023\/05\/12\/proposal-justification-and-choice-of-competing-architectures\/"},"modified":"2023-05-25T23:18:54","modified_gmt":"2023-05-25T21:18:54","slug":"proposal-justification-and-choice-of-competing-architectures","status":"publish","type":"post","link":"https:\/\/cesam.community\/fr\/2023\/05\/12\/proposal-justification-and-choice-of-competing-architectures\/","title":{"rendered":"Proposition, justification et choix des architectures concurrentes"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><section class=\"vc_row wpb_row vc_row-fluid  vc_custom_1675958784901\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-dark-gray margin-20px-bottom font-weight-600 display-inline-block alt-font heading-style2  heading-1\"  style=\"font-size: 15px;\" data-fontsize=\"15px\">Extrait du livre blanc : Le r\u00f4le de l\u2019architecte \u2013 Le Cercle CESAM<\/span><\/div><\/div><\/div><\/section><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1675957888898 vc_row-has-fill pofo-stretch-content pofo-stretch-row-container\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><div class=\"font-weight-500 text-uppercase d-inline-block text-small alt-font heading-style6  vc_custom_1675954912068  heading-2\"  style=\"font-weight: 600;\"><span class=\"text-outside-line-left\">Pr\u00e9ambule<\/span><\/div><div class=\"last-paragraph-no-margin\"><p style=\"text-align: justify;\">L\u2019architecte identifie les solutions candidates issues de l\u2019analyse bo\u00eete blanche pouvant r\u00e9pondre aux besoins selon les principes de l\u2019ing\u00e9nierie collaborative. Avec les bonnes parties prenantes, il d\u00e9finit les crit\u00e8res d\u2019\u00e9valuation des architectures (ex : niveau de couverture des besoins, QCD, Risk, Re-use, Quantification de la nouveaut\u00e9\u2026) puis documente \u00e9galement leurs points forts et leurs faiblesses en capitalisant les justifications associ\u00e9es.<\/p>\n<\/div><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1675958886754 pofo-stretch-content pofo-stretch-row-container\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-large margin-25px-bottom display-inline-block alt-font text-uppercase heading-style3  vc_custom_1675957979951  heading-3\"  style=\"font-size: 22px; font-weight: 600; color: #1e5dbc;\" data-fontsize=\"22px\">L\u2019ESSENTIEL<\/span><div class=\"last-paragraph-no-margin\"><p style=\"text-align: justify;\">La s\u00e9lection d\u2019une architecture parmi plusieurs architectures concurrentes se fait selon un processus de s\u00e9lection qui doit \u00eatre justifi\u00e9 sur la base de crit\u00e8res, s\u00e9lectionn\u00e9s selon les principes de l\u2019ing\u00e9nierie syst\u00e8me, crit\u00e8res selon lesquels l\u2019architecture peut \u00eatre \u00e9valu\u00e9e selon ses forces et faiblesses.<\/p>\n<\/div><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1675958895317 pofo-stretch-content pofo-stretch-row-container\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-large margin-25px-bottom display-inline-block alt-font text-uppercase heading-style3  vc_custom_1675955485886  heading-4\"  style=\"font-size: 22px; font-weight: 600; color: #cc3b1e;\" data-fontsize=\"22px\">LES ECUEILS PRINCIPAUX<\/span><div class=\"last-paragraph-no-margin\"><p style=\"text-align: justify;\">Parmi les principaux \u00e9cueils, on notera :<\/p>\n<ul>\n<li style=\"text-align: justify;\">Il n\u2019y a pas assez de solutions candidates. C\u2019est souvent induit par trop de contraintes : manque de temps, de moyens et parfois d\u2019imagination (on est d\u00e9j\u00e0 content d\u2019avoir une solution r\u00e9pondant aux besoins).<\/li>\n<li style=\"text-align: justify;\">Dans les processus it\u00e9ratifs rapides (y compris les processus AGILES), il est parfois d\u00e9licat de positionner dans le cycle, l\u2019identification d\u2019architectures candidates et les justifications. On a tendance \u00e0 pr\u00e9senter la solution obtenue.<\/li>\n<li style=\"text-align: justify;\">Pas de justification capitalis\u00e9e au moment de la conception, ce qui entra\u00eene du r\u00e9troengineering apr\u00e8s coup, ou de la perte d&rsquo;informations et des difficult\u00e9s \u00e0 apporter les justifications lors d\u2019un audit, de l\u2019analyse d\u2019impacts ou d\u2019\u00e9volutions ult\u00e9rieures.<\/li>\n<li style=\"text-align: justify;\">Analyse bo\u00eete noire insuffisante, ce qui entra\u00eene un biais dans la s\u00e9lection des crit\u00e8res, des parties prenantes\u2026<\/li>\n<li style=\"text-align: justify;\">Ne pas anticiper la variabilit\u00e9 des besoins dans l\u2019\u00e9valuation des architectures candidates.<\/li>\n<li style=\"text-align: justify;\">Mauvais choix des crit\u00e8res permettant de choisir entre les architectures concurrentes : mauvaise prise en compte du non-fonctionnel (\u00e9volutivit\u00e9, r\u00e9silience\u2026), crit\u00e8res de diff\u00e9rences\u2026<\/li>\n<li style=\"text-align: justify;\">Ne pas prendre en compte l\u2019architecture du mod\u00e8le de donn\u00e9es qui est clef sur certains types de syst\u00e8mes.<\/li>\n<li style=\"text-align: justify;\">Implication de trop peu de parties prenantes ou surrepr\u00e9sentation de certaines parties prenantes (marketing, client\u2026).<\/li>\n<li style=\"text-align: justify;\">Pas de factualisation des crit\u00e8res : l\u2019\u00e9valuation n\u2019est plus objective.<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1675958903368 pofo-stretch-content pofo-stretch-row-container\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-large margin-25px-bottom display-inline-block alt-font text-uppercase heading-style3  vc_custom_1675955454289  heading-5\"  style=\"font-size: 22px; font-weight: 600; color: #84d620;\" data-fontsize=\"22px\">LES BONNES PRATIQUES<\/span><div class=\"last-paragraph-no-margin\"><p style=\"text-align: justify;\">Voici quelques bonnes pratiques \u00e0 prendre en compte :<\/p>\n<ul>\n<li style=\"text-align: justify;\">Pr\u00e9voir cette phase dans le processus de d\u00e9veloppement : imposer par exemple une revue technique r\u00e9guli\u00e8rement d\u00e9di\u00e9e \u00e0 ce sujet (1 fois par mois par exemple), ou un crit\u00e8re aux jalons projet, ou encore un questionnement tous les x sprints.<\/li>\n<li style=\"text-align: justify;\">Ajuster l&rsquo;effort au niveau du risque et de l&rsquo;enjeu associ\u00e9 en fonction des sujets.<\/li>\n<li style=\"text-align: justify;\">Faire \u00e9merger des architectures en rupture en organisant des ateliers cr\u00e9ativit\u00e9 et innovation.<\/li>\n<li style=\"text-align: justify;\">Mettre en place une bonne gestion de la connaissance (dont syst\u00e8mes pass\u00e9s, veille techno et brevets\u2026).<\/li>\n<li style=\"text-align: justify;\">Mod\u00e9liser et d\u00e9crire les diff\u00e9rentes alternatives pour aider \u00e0 les pr\u00e9senter, les valider, et faire les choix en connaissance de cause.<\/li>\n<li style=\"text-align: justify;\">Communiquer au travers des diagrammes de l&rsquo;architecture afin de s\u2019en servir de supports au discours.<\/li>\n<li style=\"text-align: justify;\">Utiliser des processus de positionnement des architectures les unes par rapport aux autres : la matrice de Pugh, analyse risque\/valeur, effort\/b\u00e9n\u00e9fice, matrice DSM\u2026<\/li>\n<li style=\"text-align: justify;\">Utilisation d&rsquo;outils logiciels permettant d&rsquo;explorer rapidement un grand nombre d&rsquo;architectures.<\/li>\n<li style=\"text-align: justify;\">R\u00e9aliser un prototype pour les cas o\u00f9 le risque en jeu le justifie (c&rsquo;est le principe du POC).<\/li>\n<li style=\"text-align: justify;\">Pour des \u00e9volutions, il est int\u00e9ressant de comparer avec le statu quo pour challenger l&rsquo;apport de valeur.<\/li>\n<li style=\"text-align: justify;\">Pour le mod\u00e8le de donn\u00e9es (des syst\u00e8mes d&rsquo;information), distinguer et relier le mod\u00e8le conceptuel au mod\u00e8le d&rsquo;impl\u00e9mentation (ex : un mod\u00e8le conceptuel complet &#8211; au sens math\u00e9matique &#8211; peut donner un mod\u00e8le d&rsquo;impl\u00e9mentation complexe et co\u00fbteux).<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1677228482631 pofo-stretch-content pofo-stretch-row-container\"><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-large margin-25px-bottom display-inline-block alt-font text-uppercase heading-style3  vc_custom_1675956721188  heading-6\"  style=\"font-size: 22px; font-weight: 600; color: #ffbf00;\" data-fontsize=\"22px\">TEMOIGNAGES<\/span><div class=\"last-paragraph-no-margin\"><p style=\"text-align: justify;\">Nous avons compil\u00e9 ici un certain nombre de verbatims de chef de projet ou d\u2019architecte syst\u00e8me de diff\u00e9rentes entreprises, et qui font \u00e9cho \u00e0 cette phase :<\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: 10pt;\"><em><strong>\u201c<\/strong> Nous inscrivons l&rsquo;identification d&rsquo;options et non pas une seule architecture dans le processus de conception.<br \/>\n<strong>\u201c<\/strong> Nous nous posons syst\u00e9matiquement la question de l&rsquo;enjeu associ\u00e9 \u00e0 la conception. C&rsquo;est ce qui drive nos choix d&rsquo;alternatives.<br \/>\n<strong>\u201c<\/strong> Nous utilisons un Novelty Ranking qui \u00e9value le risque qu&rsquo;on prend en fonction du nombre de fois o\u00f9 la solution a \u00e9t\u00e9 d\u00e9ploy\u00e9e.<\/em><\/span><\/p>\n<\/div><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1676045500631 cover-background wow fadeIn pofo-stretch-content pofo-stretch-row-container pofo-row-responsive-69ee4102ea739\"><div class=\"bg-extra-dark-gray bg-overlay\" style=\"opacity:0.8; \"><\/div><div class=\"wpb_column vc_column_container vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth wow fadeInUp text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"text-extra-large margin-25px-bottom vertical-align-middle sm-width-100 display-inline-block alt-font heading-style3  vc_custom_1676045384304 pofo-button-responsive-69ee4102ea7cb  heading-7\"  style=\"font-size: 18px; color: #ffffff;\" data-fontsize=\"18px\">Cet article est \u00e9galement disponible en format pdf.<\/span><a  href=\"https:\/\/cesam.community\/wp-content\/uploads\/2023\/05\/The_role_of_the_architect_WP_Excerpt7_EN_v0_9.pdf\" target=\"_self\" class=\"btn pofo-button-1 button-style2  btn-white  btn-small  pofo-button-responsive-69ee4102ea80a\" >TELECHARGER<i class=\"ti-download   margin-5px-left no-margin-right\" aria-hidden=\"true\"><\/i><\/a><\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div><section data-vc-full-width=\"true\" data-vc-full-width-init=\"false\" class=\"vc_row wpb_row vc_row-fluid  vc_custom_1676018195365 wow fadeIn vc_row-has-fill pofo-stretch-content pofo-stretch-row-container pofo-row-responsive-69ee4102ea85c\"><div class=\"wpb_column vc_column_container vc_col-has-fill vc_col-sm-12 vc_col-md-offset-1 vc_col-md-10 col-xs-mobile-fullwidth\"><div class=\"vc_column-inner vc_custom_1676018441157\"><div class=\"wpb_wrapper\"><div class=\"vc_row wpb_row vc_inner vc_row-fluid  vc_custom_1676018467029\"><div class=\"wpb_column vc_column_container vc_col-sm-12  col-xs-mobile-fullwidth text-center\"><div class=\"vc_column-inner \"><div class=\"wpb_wrapper\"><span class=\"margin-100px-bottom xs-margin-40px-bottom font-weight-600 display-inline-block alt-font text-extra-small text-outside-line text-uppercase heading-style5  vc_custom_1676018337971  heading-8\"  style=\"font-size: 20px; color: #1c1c1c;\" data-fontsize=\"20px\">Des commentaires ?<\/span><div class=\"last-paragraph-no-margin\"><p style=\"text-align: center;\">Vos commentaires seront \u00e9tudi\u00e9s par les membres du Cercle lors de la prochaine r\u00e9union mensuelle.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f33598-o1\" lang=\"en-US\" dir=\"ltr\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/34208#wpcf7-f33598-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<div style=\"display: none;\">\n<input type=\"hidden\" name=\"_wpcf7\" value=\"33598\" \/>\n<input type=\"hidden\" name=\"_wpcf7_version\" value=\"5.9.8\" \/>\n<input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/>\n<input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f33598-o1\" \/>\n<input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/>\n<input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<input type=\"hidden\" name=\"_wpcf7_recaptcha_response\" value=\"\" \/>\n<\/div>\n<div>\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"contact-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required input-border-bottom\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Full name*\" value=\"\" type=\"text\" name=\"contact-name\" \/><\/span><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"contact-company\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required input-border-bottom\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Company*\" value=\"\" type=\"text\" name=\"contact-company\" \/><\/span><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"contact-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email input-border-bottom\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"E-mail*\" value=\"\" type=\"email\" name=\"contact-email\" \/><\/span><br \/>\n<span class=\"wpcf7-form-control-wrap\" data-name=\"contact-message\"><textarea cols=\"40\" rows=\"3\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required xs-margin-20px-bottom input-border-bottom\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your comment*\" name=\"contact-message\"><\/textarea><\/span><br \/>\n\t<span class=\"wpcf7-form-control-wrap recaptcha\" data-name=\"recaptcha\"><span data-sitekey=\"6LfrTVwpAAAAAO-8Y798BV1Fkw1VGKBXJBEV30-H\" class=\"wpcf7-form-control wpcf7-recaptcha g-recaptcha\"><\/span>\r\n<noscript>\r\n\t<div class=\"grecaptcha-noscript\">\r\n\t\t<iframe loading=\"lazy\" src=\"https:\/\/www.google.com\/recaptcha\/api\/fallback?k=6LfrTVwpAAAAAO-8Y798BV1Fkw1VGKBXJBEV30-H\" frameborder=\"0\" scrolling=\"no\" width=\"310\" height=\"430\">\r\n\t\t<\/iframe>\r\n\t\t<textarea name=\"g-recaptcha-response\" rows=\"3\" cols=\"40\" placeholder=\"reCaptcha Response Here\">\r\n\t\t<\/textarea>\r\n\t<\/div>\r\n<\/noscript>\r\n<\/span><br \/>\n<input class=\"wpcf7-form-control wpcf7-submit has-spinner btn btn-small btn-black\" type=\"submit\" value=\"POST\" \/>\n\t<\/p>\n<\/div><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n<\/div><\/div><\/div><\/section><div class=\"vc_row-full-width vc_clearfix\"><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Extrait du livre blanc : Le r\u00f4le de l\u2019architecte \u2013 Le Cercle CESAMPr\u00e9ambuleL\u2019architecte identifie les solutions candidates issues de l\u2019analyse bo\u00eete blanche pouvant r\u00e9pondre aux besoins selon les principes de l\u2019ing\u00e9nierie collaborative. Avec les bonnes parties prenantes, il d\u00e9finit les crit\u00e8res d\u2019\u00e9valuation des architectures (ex : niveau de couverture des besoins, QCD, Risk, Re-use, Quantification de la nouveaut\u00e9\u2026) puis documente \u00e9galement leurs points forts et leurs faiblesses en capitalisant les justifications associ\u00e9es. L\u2019ESSENTIELLa s\u00e9lection d\u2019une architecture parmi plusieurs architectures concurrentes se fait selon un processus de s\u00e9lection qui doit \u00eatre justifi\u00e9 sur la base de crit\u00e8res, s\u00e9lectionn\u00e9s selon les principes de l\u2019ing\u00e9nierie syst\u00e8me, crit\u00e8res selon lesquels l\u2019architecture peut \u00eatre \u00e9valu\u00e9e selon ses forces et faiblesses. LES ECUEILS PRINCIPAUXParmi les principaux \u00e9cueils, on notera : Il n\u2019y a pas assez de solutions candidates. C\u2019est souvent induit par trop de contraintes : manque de temps, de moyens et parfois d\u2019imagination (on est d\u00e9j\u00e0 content d\u2019avoir une solution r\u00e9pondant aux besoins). Dans les processus it\u00e9ratifs rapides (y compris les processus AGILES), il est parfois d\u00e9licat de positionner dans le cycle, l\u2019identification d\u2019architectures candidates et les justifications. On a tendance \u00e0 pr\u00e9senter la solution obtenue. Pas de justification capitalis\u00e9e au moment de la conception,...","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236,237],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Proposition, justification et choix des architectures concurrentes<\/title>\n<meta name=\"description\" content=\"La s\u00e9lection d\u2019une architecture parmi plusieurs architectures concurrentes se fait selon un processus de s\u00e9lection qui doit \u00eatre justifi\u00e9 sur la base de...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cesam.community\/fr\/2023\/05\/12\/proposal-justification-and-choice-of-competing-architectures\/\" \/>\n<meta property=\"og:locale\" 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