{"id":4868,"date":"2026-09-18T14:40:24","date_gmt":"2026-09-18T12:40:24","guid":{"rendered":"https:\/\/ellistat.com\/?post_type=guide-dutilisateur&#038;p=4868"},"modified":"2026-09-18T14:40:24","modified_gmt":"2026-09-18T12:40:24","slug":"introduction","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/en\/guide-dutilisateur\/introduction\/","title":{"rendered":"Introduction"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Process control menus answer the question, \u00abIs my process within tolerance?\u00bb The Tolerance menu answers the question that comes before it\u2014one that is all too often addressed based on intuition: \u00abWhat tolerance should be required, and for which characteristic?\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The problem is always the same. A characteristic Y must remain within its specification\u2014whether it\u2019s stiffness, clearance, or performance. You cannot directly control Y; instead, you control the X characteristics that you manufacture and measure. Transferring the tolerance means translating the requirement for Y into requirements for the X characteristics, without demanding more than necessary or less than sufficient.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are two ways to answer, depending on what you know about the relationship between X and Y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0You have measurements but no equations: Sp\u00e9cigraphe fits a model to your data and derives the tolerance from it.<\/li>\n\n\n\n<li>\u00a0You have an equation (calculation formula, dimension chain): Monte Carlo simulation generates the X values based on their tolerances and distributions, and uses them to determine the behavior of Y.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Click on the \u00abTolerances\u00bb menu, then click on \u00abSpecigraph\u00bb or \u00abMonte Carlo Simulation.\u00bb.<\/p>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":true},"menu-guide-dutilisateur":[42],"class_list":["post-4868","guide-dutilisateur","type-guide-dutilisateur","status-publish","hentry","menu-guide-dutilisateur-9-tolerancement"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Introduction - Ellistat<\/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:\/\/ellistat.com\/en\/users-guide\/introduction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Introduction - Ellistat\" \/>\n<meta property=\"og:description\" content=\"Les menus de ma\u00eetrise des proc\u00e9d\u00e9s r\u00e9pondent \u00e0 la question \u00ab mon proc\u00e9d\u00e9 tient-il la tol\u00e9rance ? \u00bb. Le menu Tol\u00e9rancement r\u00e9pond \u00e0 la question qui vient avant, et que l&rsquo;on traite trop souvent \u00e0 l&rsquo;intuition : \u00ab quelle tol\u00e9rance faut-il exiger, et sur quelle caract\u00e9ristique ? \u00bb Le probl\u00e8me est toujours le m\u00eame. 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Le menu Tol\u00e9rancement r\u00e9pond \u00e0 la question qui vient avant, et que l&rsquo;on traite trop souvent \u00e0 l&rsquo;intuition : \u00ab quelle tol\u00e9rance faut-il exiger, et sur quelle caract\u00e9ristique ? \u00bb Le probl\u00e8me est toujours le m\u00eame. 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