{"id":17757,"date":"2023-09-15T10:44:15","date_gmt":"2023-09-15T10:44:15","guid":{"rendered":"https:\/\/blog.infraspeak.com\/?p=17757"},"modified":"2026-04-02T18:29:41","modified_gmt":"2026-04-02T18:29:41","slug":"mtbf","status":"publish","type":"post","link":"https:\/\/blog.infraspeak.com\/fr\/mtbf\/","title":{"rendered":"Que signifie MTBF ? Comment le calculer ?"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<h2 class=\"wp-block-heading\"><strong>Qu\u2019est-ce que le MTBF ?<\/strong><\/h2>\n\n\n\n<p>MTBF signifie \u00ab\u00a0<strong>Mean Time Between Failures<\/strong>\u00a0\u00bb ou Dur\u00e9e moyenne entre d\u00e9faillances. Il s\u2019agit du temps moyen \u00e9coul\u00e9 entre deux d\u00e9faillances dans le m\u00eame actif.\u00a0<\/p>\n\n\n\n<p>Aux c\u00f4t\u00e9s du <a href=\"https:\/\/blog.infraspeak.com\/mttr\/\">MTTR<\/a>  (\u00ab Mean Time to Repair \u00bb ou Dur\u00e9e moyenne de r\u00e9paration), il s&rsquo;agit de l&rsquo;un des indicateurs cl\u00e9s de performance ou KPI de maintenance les plus importants pour d\u00e9terminer la disponibilit\u00e9 et la fiabilit\u00e9 avec un <a href=\"https:\/\/infraspeak.com\/fr\/plateforme\/logiciel-gestion-des-actifs\">logiciel gestion des actifs<\/a>. Plus le MTBF est \u00e9lev\u00e9, plus l&rsquo;actif est fiable.\n\n\n\n<p>Dans cet article, nous examinerons comment calculer le MTBF et pourquoi ce dernier est d\u00e9terminant pour \u00e9tablir un plan de maintenance pr\u00e9ventive efficace. \u00cates-vous pr\u00eat ?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Comment calculer le MTBF ?<\/strong><\/h2>\n\n\n\n<p>Pour calculer le MTBF, vous devez diviser la dur\u00e9e de fonctionnement totale par le nombre de d\u00e9faillances<\/p>\n\n\n\n<p>La dur\u00e9e de fonctionnement totale est la diff\u00e9rence entre la dur\u00e9e totale de travail et la dur\u00e9e de d\u00e9faillance totale. <strong>Ainsi, voici la formule pour obtenir le MTBF<\/strong>\u00a0:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/_1ptU1WlGG0t4JII1Uu0C_uLStYnwiy0v_5Ni4u2HAjPNqNdaAedPKbJzlS2h0-lvly0qjOCi4eKBnrY1SZ6yynXsMX19n3r5RVu7wsk0k9eBfCHtdNqlzk4zVlHMnj_ZyD_wz2ulnagQQ7LFCZV1me2r5-Q-i9-YGftfaIFSvmIo_sEyEaa1p6QzKs8Sbvl\" alt=\"MTBF formula\" width=\"1305\" height=\"262\" \/><\/figure>\n\n\n\n<p>Dans la formule pour obtenir le MTBF&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La dur\u00e9e totale de travail correspond au nombre d\u2019heures de fonctionnement de la machine si elle n\u2019\u00e9tait pas d\u00e9faillant ;<\/li>\n\n\n\n<li>La dur\u00e9e de d\u00e9faillance totale est le temps d\u2019arr\u00eat non planifi\u00e9 (excluant donc la maintenance programm\u00e9e, c\u2019est-\u00e0-dire les inspections, les r\u00e9visions p\u00e9riodiques ou les remplacements pr\u00e9ventifs)&nbsp;;<\/li>\n\n\n\n<li>Le nombre de pannes est \u00e9gal au nombre de d\u00e9faillances.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Exemple d\u2019un calcul de MTBF&nbsp;<\/strong><\/h2>\n\n\n\n<p>Admettons qu\u2019un actif cens\u00e9 fonctionner 24 heures sur 24 subisse trois d\u00e9faillances. La premi\u00e8re dure une heure, la deuxi\u00e8me 2 heures et la panne finale dure 30 minutes.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La dur\u00e9e totale de travail = 24 heures&nbsp;<\/li>\n\n\n\n<li>La dur\u00e9e de d\u00e9faillance totale = 3,5 heures (1 + 2 + 0,5)<\/li>\n\n\n\n<li>Le nombre de d\u00e9faillances = 3&nbsp;<\/li>\n<\/ul>\n\n\n\n<p>Ainsi, selon la formule pour obtenir le MTBF, le <strong>calcul de la Dur\u00e9e moyenne entre d\u00e9faillances sera comme suit<\/strong>&nbsp;:<br><img decoding=\"async\" alt=\"MTBF Calculation \" src=\"https:\/\/lh5.googleusercontent.com\/lzVS2mG7mZs1nHOsYUq5LWugHKWHHgKNLPPrOYjgT-WzMKHbq9uJv6Cy9g0QYZVO4EkMrjMUpYQucjJPIdp1NmavHoEUksibmlN1NLUgSVp8jnHMSzipWwhcOn7mcHuvhbuO1zGoiFOw-PVehOKtoCyfHa2HKULE8CCq4tqlZrkBuOKdf91xUdiVlZQf77qv\" width=\"641\" height=\"129\"><\/p>\n\n<p>Pour faciliter ces calculs complexes et assurer un suivi pr\u00e9cis des performances, un <a href=\"https:\/\/infraspeak.com\/fr\/solutions\/logiciel-cafm\">logiciel CAFM<\/a> peut automatiser l&rsquo;analyse des donn\u00e9es et fournir des rapports d\u00e9taill\u00e9s sur les indicateurs de fiabilit\u00e9 comme le MTBF.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pourquoi le MTBF est-il important&nbsp;?&nbsp;<\/strong><\/h2>\n\n\n\n<p>Le MTBF est utile pour <strong>estimer la probabilit\u00e9 de d\u00e9faillance d\u2019un actif et la fr\u00e9quence \u00e0 laquelle certaines d\u00e9faillances se produisent<\/strong>. Cela le rend extr\u00eamement important pour l\u2019ing\u00e9nierie de la fiabilit\u00e9, tout en \u00e9tant \u00e9galement un indicateur de la disponibilit\u00e9 de l\u2019actif.<br><\/p>\n\n\n\n<p>Bien qu&rsquo;il existe de nombreux autres <a href=\"https:\/\/blog.infraspeak.com\/maintenance-indicators-kpis\/\">indicateurs de maintenance<\/a> que vous devriez surveiller, le MTBF repr\u00e9sente une ligne directrice pour la planification de la maintenance pr\u00e9ventive. De plus, si vous faites une estimation pr\u00e9cise avec un <a href=\"https:\/\/infraspeak.com\/fr\/solutions\/logiciel-gestion-stocks\">logiciel gestion des stocks<\/a>, cela am\u00e9liorera l&rsquo;inventaire et \u00e9vitera les ruptures de stock.\n\n<p>Pour optimiser le suivi de ces indicateurs de maintenance, il est essentiel de s&rsquo;\u00e9quiper d&rsquo;outils performants. Un <a href=\"https:\/\/infraspeak.com\/fr\/solutions\/gestion-des-installations\">logiciel gestion des installations<\/a> permet de centraliser et d&rsquo;analyser efficacement les donn\u00e9es n\u00e9cessaires au calcul du MTBF et \u00e0 l&rsquo;am\u00e9lioration de la fiabilit\u00e9 des \u00e9quipements.<\/p>\n\n\n\n<p><br>Cependant, rappelez-vous que tout indicateur de performance cl\u00e9 ne vaut que par la qualit\u00e9 des donn\u00e9es. Pour vous assurer d&rsquo;avoir des donn\u00e9es pr\u00e9cises de l&rsquo;\u00e9quipement pour calculer le MTBF, vous avez besoin du bon <a href=\"https:\/\/infraspeak.com\/fr\/solutions\/logiciel-gmao\">logiciel GMAO<\/a> (gestion de maintenance assist\u00e9e par ordinateur). (<a href=\"https:\/\/blog.infraspeak.com\/fr\/gmao\/\">GMAO<\/a>)\n\n\n\n<h2 class=\"wp-block-heading\"><strong>MTBF et MTTR : en quoi sont-ils diff\u00e9rents&nbsp;?<\/strong><\/h2>\n\n\n\n<p>Le MTBF <strong>mesure la fiabilit\u00e9<\/strong>, tandis que le MTTR est essentiel pour <strong>juger de l\u2019efficacit\u00e9 des r\u00e9parations<\/strong>.<\/p>\n\n\n\n<p>La dur\u00e9e moyenne de r\u00e9paration repr\u00e9sente le temps moyen n\u00e9cessaire pour qu\u2019un actif soit \u00e0 nouveau op\u00e9rationnel. Avoir un MTTR \u00e9lev\u00e9 signifie que vos actifs et \u00e9quipements sont hors service pendant une longue p\u00e9riode apr\u00e8s une panne.<br><\/p>\n\n\n\n<p>En d\u2019autres termes, le maintien d\u2019un MTBF \u00e9lev\u00e9 garantit la fiabilit\u00e9 d\u2019un actif. Le maintien d\u2019un MTTR faible garantit que les temps d\u2019arr\u00eat durent le moins possible. Ces deux indicateurs permettent aux gestionnaires d\u2019estimer la dur\u00e9e de disponibilit\u00e9 d\u2019un syst\u00e8me particulier.<\/p>\n\n<p>Dans un contexte o\u00f9 la fiabilit\u00e9 des \u00e9quipements est cruciale, le respect des normes de maintenance devient primordial. Un <a href=\"https:\/\/infraspeak.com\/fr\/plateforme\/conformite\">logiciel conformit\u00e9<\/a> aide \u00e0 documenter et \u00e0 suivre les indicateurs de performance comme le MTBF et le MTTR, garantissant ainsi la conformit\u00e9 aux standards industriels.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Comment utiliser conjointement le MTTR et le MTBF ?<\/strong><\/h2>\n\n\n\n<p>L\u2019analyse du MTBF\u00a0et du MTTR nous permet de pr\u00e9voir la productivit\u00e9, de planifier les temps d\u2019arr\u00eat programm\u00e9s et de pr\u00e9voir les co\u00fbts de maintenance pr\u00e9ventive tout au long de l\u2019ann\u00e9e. Ces informations aident les gestionnaires d\u2019installations dans leur processus de prise de d\u00e9cision au regard de quels actifs n\u00e9cessitent le plus d\u2019entretien, le moment o\u00f9 ils doivent l&rsquo;\u00eatre et ceux qui doivent \u00eatre remplac\u00e9s.<br><\/p>\n\n\n\n<p>L\u2019objectif est de diminuer le nombre de pannes gr\u00e2ce \u00e0 des politiques de maintenance pr\u00e9ventive intelligentes. Un MTBF plus \u00e9lev\u00e9 rendra votre entreprise plus cr\u00e9dible et digne de confiance, tant en interne qu\u2019aupr\u00e8s de vos clients. C\u2019est du bon travail !<\/p>\n\n\n\n<p>Quant au MTTR, essayez de le maintenir \u00e0 un faible niveau. Votre \u00e9quipe doit agir rapidement.&nbsp; plus vite vous rem\u00e9diez aux probl\u00e8mes, plus vite ils seront r\u00e9solus. Mais ce n\u2019est pas tout. D\u2019une part, la diminution du MTTR d\u00e9pend d\u2019une gestion efficace de la maintenance en temps r\u00e9el et <a href=\"https:\/\/blog.infraspeak.com\/maintenance-work-orders\/\">des bons de travail<\/a> clairs.<\/p>\n\n<p>Pour une intervention rapide et efficace sur le terrain, l&rsquo;utilisation d&rsquo;un <a href=\"https:\/\/infraspeak.com\/fr\/solutions\/logiciel-field-service-management\">logiciel field service management<\/a> s&rsquo;av\u00e8re indispensable. Cet outil permet de coordonner les \u00e9quipes de maintenance et d&rsquo;optimiser les temps de r\u00e9paration, contribuant ainsi \u00e0 maintenir un MTBF \u00e9lev\u00e9.<\/p>\n\n\n\n<p>D\u2019autre part, vous devez comprendre pourquoi les d\u00e9faillances se produisent. D\u00e9terminer la <a href=\"https:\/\/blog.infraspeak.com\/root-cause-analysis\/\">cause racine<\/a> de chaque d\u00e9faillance est le seul moyen d\u2019\u00e9viter qu\u2019elle ne se reproduise. Ou, du moins, pour \u00e9tablir des processus qui rendent une telle situation moins probable. Associer une action rapide \u00e0 une analyse des causes racines \u00e9vitera des pannes de longue dur\u00e9e.<\/p>\n\n\n\n<p><br>Avec un MTBF \u00e9lev\u00e9 et un MTTR faible, le fonctionnement de votre syst\u00e8me se rapprochera de sa pleine capacit\u00e9. Dans ce cas, maintenez les bonnes pratiques et ne manquez jamais d\u2019investir dans la maintenance pr\u00e9ventive !<strong> Vous trouverez <a href=\"https:\/\/blog.infraspeak.com\/preventive-maintenance\/\">ici tout ce que vous devez savoir sur la maintenance pr\u00e9ventive <\/a><\/strong><\/p>\n\n\n\n<p>\u00a0<br>\ud83d\udc77 Avec Infraspeak, <strong>il est plus facile de rester aux commandes de ces deux mesures<\/strong> et d\u2019am\u00e9liorer votre rendement. Vous voulez savoir comment ?<a href=\"https:\/\/infraspeak.com\/fr\/demo\"><strong> Contactez-nous<\/strong><\/a> !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u2019est-ce que le MTBF ? MTBF signifie \u00ab\u00a0Mean Time Between Failures\u00a0\u00bb ou Dur\u00e9e moyenne entre d\u00e9faillances. Il s\u2019agit du temps moyen \u00e9coul\u00e9 entre deux d\u00e9faillances dans le m\u00eame actif.\u00a0 Aux c\u00f4t\u00e9s du MTTR (\u00ab Mean Time to Repair \u00bb ou Dur\u00e9e moyenne de r\u00e9paration), il s&rsquo;agit de l&rsquo;un des indicateurs cl\u00e9s de performance ou KPI [&hellip;]<\/p>\n","protected":false},"author":54,"featured_media":13409,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[771],"tags":[],"class_list":["post-17757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-maintenance"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Que signifie MTBF ? 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