{"id":4656,"date":"2026-08-12T16:59:25","date_gmt":"2026-08-12T14:59:25","guid":{"rendered":"https:\/\/ellistat.com\/?post_type=guide-dutilisateur&#038;p=4656"},"modified":"2026-08-12T16:59:25","modified_gmt":"2026-08-12T14:59:25","slug":"plan-de-balayage","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/de\/guide-dutilisateur\/plan-de-balayage\/","title":{"rendered":"Scanplan"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Le criblage r\u00e9pond \u00e0 une seule question,\u00a0<strong>lesquels de mes facteurs comptent ?<\/strong>\u00a0 et l\u2019on accepte de tout confondre par ailleurs pour y r\u00e9pondre avec le minimum d\u2019essais.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"644\" height=\"298\" src=\"https:\/\/ellistat.com\/wp-content\/uploads\/balayage.png\" alt=\"\" class=\"wp-image-4657\" srcset=\"https:\/\/ellistat.com\/wp-content\/uploads\/balayage.png 644w, https:\/\/ellistat.com\/wp-content\/uploads\/balayage-300x139.png 300w, https:\/\/ellistat.com\/wp-content\/uploads\/balayage-18x8.png 18w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le r\u00e9glage \u00ab Nombre maximal de niveaux \u00bb propose 2 ou 3, et change compl\u00e8tement la famille de plans offerte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00c0 2 niveaux<\/strong>&nbsp;: les tables L4, L8, L12, L16, L20 selon le nombre de facteurs. Jusqu\u2019\u00e0 19 facteurs en 20 essais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00c0 3 niveaux<\/strong>&nbsp;: les&nbsp;<strong>DSD<\/strong>&nbsp;(<em>Definitive Screening Design<\/em>), de DSD3 \u00e0 DSD12, ainsi que L9 et L18. Le tableau des facteurs demande alors trois niveaux : min, point central, max.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udca1 Le DSD est le plan de criblage moderne, et il m\u00e9rite d\u2019\u00eatre connu : \u00e0 trois niveaux et pour un co\u00fbt d\u2019essais proche d\u2019un plan \u00e0 deux niveaux, il\u00a0<strong>d\u00e9tecte partiellement la courbure<\/strong>\u00a0et ne confond pas les effets principaux avec les interactions d\u2019ordre 2. Concr\u00e8tement, il \u00e9vite le pi\u00e8ge classique du criblage \u00e0 deux niveaux, conclure \u00ab ce facteur n\u2019a pas d\u2019effet \u00bb alors que sa r\u00e9ponse passe par un maximum \u00e0 l\u2019int\u00e9rieur du domaine, et donne la m\u00eame valeur aux deux bornes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f Un plan de balayage n\u2019est pas un plan de mod\u00e9lisation. Il d\u00e9signe des suspects ; il ne quantifie pas proprement leurs effets et n\u2019est pas fait pour optimiser. L\u2019assistant \u00ab Comment choisir ? \u00bb l\u2019\u00e9carte explicitement de ces objectifs  \u00ab Uniquement adapt\u00e9 au criblage, pas \u00e0 la mod\u00e9lisation ou l\u2019optimisation \u00bb.<\/p>","protected":false},"featured_media":0,"menu_order":70,"template":"","meta":{"_acf_changed":true},"menu-guide-dutilisateur":[24],"class_list":["post-4656","guide-dutilisateur","type-guide-dutilisateur","status-publish","hentry","menu-guide-dutilisateur-7-doe-plans-dexperiences"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Plan de balayage - Ellistat<\/title>\n<meta name=\"description\" content=\"Identifiez rapidement les facteurs qui comptent avec un plan de criblage \u00e0 2 niveaux ou un DSD \u00e0 3 niveaux, qui d\u00e9tecte aussi la courbure. 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