{"id":4694,"date":"2026-08-13T14:50:43","date_gmt":"2026-08-13T12:50:43","guid":{"rendered":"https:\/\/ellistat.com\/?post_type=guide-dutilisateur&#038;p=4694"},"modified":"2026-08-13T14:50:43","modified_gmt":"2026-08-13T12:50:43","slug":"optimisation","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/en\/guide-dutilisateur\/optimisation\/","title":{"rendered":"Optimization"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Un mod\u00e8le pr\u00e9dit\u00a0<strong>UNE<\/strong>\u00a0r\u00e9ponse. La r\u00e9alit\u00e9 industrielle en demande plusieurs \u00e0 la fois : maximiser la r\u00e9sistance\u00a0<strong>and<\/strong>minimiser le temps de cycle\u00a0<strong>and<\/strong>\u00a0tenir une c\u00f4te en cible. C\u2019est l\u2019objet de cette page.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"644\" height=\"370\" src=\"https:\/\/ellistat.com\/wp-content\/uploads\/optimisation.png\" alt=\"\" class=\"wp-image-4695\" srcset=\"https:\/\/ellistat.com\/wp-content\/uploads\/optimisation.png 644w, https:\/\/ellistat.com\/wp-content\/uploads\/optimisation-300x172.png 300w, https:\/\/ellistat.com\/wp-content\/uploads\/optimisation-18x10.png 18w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 gauche, la liste des mod\u00e8les du projet : on&nbsp;<strong>coche ceux \u00e0 optimiser ensemble<\/strong>. \u00c0 droite, pour chacun :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>son\u00a0<strong>type d\u2019optimisation<\/strong>\u00a0:\u00a0<strong>Maximiser<\/strong>,\u00a0<strong>minimiser<\/strong>\u00a0or\u00a0<strong>target<\/strong>, avec sa\u00a0<strong>valeur cible<\/strong>\u00a0dans ce dernier cas ; <\/li>\n\n\n\n<li>ses\u00a0<strong>param\u00e8tres de d\u00e9sirabilit\u00e9<\/strong>\u00a0: les bornes qui traduisent la r\u00e9ponse en satisfaction de 0 \u00e0 1 :\u00a0<strong>Pire<\/strong>\u00a0and\u00a0<strong>Target<\/strong>\u00a0pour un objectif simple,\u00a0<strong>Pire mini \/ Cible mini \/ Cible maxi \/ Pire maxi<\/strong>\u00a0pour un objectif encadr\u00e9 ; <\/li>\n\n\n\n<li>son\u00a0<strong>Poids<\/strong>, qui dit son importance relative ; <\/li>\n\n\n\n<li>et la lecture du point courant :\u00a0<strong>Pr\u00e9diction<\/strong>,\u00a0<strong>Mesur\u00e9<\/strong>,\u00a0<strong>Erreur %<\/strong>,\u00a0<strong>D\u00e9sirabilit\u00e9<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les curseurs de facteurs d\u00e9placent le point de travail, et toutes les r\u00e9ponses se recalculent. Le bouton de calcul cherche l\u2019<strong>optimum global<\/strong>&nbsp;: le point qui maximise la d\u00e9sirabilit\u00e9 d\u2019ensemble.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trois graphiques, au choix :\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>tous les mod\u00e8les<\/strong>, <\/li>\n\n\n\n<li>the\u00a0<strong>d\u00e9sirabilit\u00e9<\/strong>, <\/li>\n\n\n\n<li>ou un mod\u00e8le en particulier.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udca1 The\u00a0<strong>d\u00e9sirabilit\u00e9<\/strong>\u00a0est le produit des d\u00e9sirabilit\u00e9s individuelles. Cette forme multiplicative n\u2019est pas un d\u00e9tail de calcul : elle signifie qu\u2019<strong>une r\u00e9ponse \u00e0 0 annule tout<\/strong>. Un r\u00e9glage excellent sur quatre crit\u00e8res et inacceptable sur le cinqui\u00e8me est rejet\u00e9, ce qui est exactement le comportement voulu, et ce qu\u2019une moyenne pond\u00e9r\u00e9e ne fait pas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f L\u2019optimum trouv\u00e9 n\u2019est\u00a0<strong>valide que dans le domaine des donn\u00e9es<\/strong>. Le mod\u00e8le prolonge volontiers ses pr\u00e9dictions au-del\u00e0, sans le signaler. Un optimum qui se place sur une borne du domaine est un signal : le vrai optimum est probablement dehors, et il faut de nouveaux essais pour l\u2019atteindre et non pas une extrapolation.<\/p>","protected":false},"featured_media":0,"menu_order":30,"template":"","meta":{"_acf_changed":true},"menu-guide-dutilisateur":[32],"class_list":["post-4694","guide-dutilisateur","type-guide-dutilisateur","status-publish","hentry","menu-guide-dutilisateur-8-ml-machine-learning"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optimisation - Ellistat<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment exploiter plusieurs mod\u00e8les de Machine Learning gr\u00e2ce au menu Optimisation dans Data Analysis d&#039;Ellistat.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ellistat.com\/en\/users-guide\/optimisation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimisation - 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