{"id":37500,"date":"2023-02-22T11:40:20","date_gmt":"2023-02-22T10:40:20","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=approfondimento&p=37500"},"modified":"2023-07-10T09:19:15","modified_gmt":"2023-07-10T08:19:15","slug":"proven-in-use-et-proven-in-use","status":"publish","type":"approfondimento","link":"https:\/\/www.gt-engineering.it\/fr\/approfondissement\/securite-des-procedes\/proven-in-use-et-proven-in-use\/","title":{"rendered":"\u00ab\u00a0Proven in Use\u00a0\u00a0\u00bb et \u00ab\u00a0Prior Use\u00a0\u00ab\u00a0"},"content":{"rendered":"\n\n \n \n \n
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LA QUESTION<\/strong> : Quelle est la diff\u00e9rence entre un dispositif Proven in Use<\/strong>\u00a0\u00a0et un dispositif Prior Use<\/strong>\u00a0?<\/p>\n

En fait, les deux termes sont assez similaires et il est tr\u00e8s facile de les confondre. Tout d’abord, de quoi parlons-nous ? Vous savez peut-\u00eatre que les composants ont besoin de donn\u00e9es de fiabilit\u00e9 pour pouvoir \u00eatre utilis\u00e9s dans un syst\u00e8me de s\u00e9curit\u00e9 instrument\u00e9<\/strong> (IEC 61511). La mani\u00e8re la plus utilis\u00e9e est ce que l’on appelle la route 1H : elle implique qu’un composant a besoin de la valeur des taux de d\u00e9faillance recommand\u00e9s par la s\u00e9rie IEC 61508 :<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

    \n
  • \u03bbSD<\/sub> : taux de d\u00e9faillance d\u00e9tect\u00e9 en toute s\u00e9curit\u00e9<\/li>\n
  • \u03bbSU<\/sub> : Taux de d\u00e9faillance s\u00fbre non d\u00e9tect\u00e9e<\/li>\n
  • \u03bbDD<\/sub> : taux de d\u00e9faillance dangereuse d\u00e9tect\u00e9e<\/li>\n
  • \u03bbDU<\/sub> : taux de d\u00e9faillance dangereuse non d\u00e9tect\u00e9e<\/li>\n
  • \u03bbNE<\/sub> : taux de d\u00e9faillance sans effet<\/li>\n<\/ul>\n

    Cependant, dans certaines situations, un composant ne dispose pas de ces donn\u00e9es, mais il a \u00e9t\u00e9 utilis\u00e9 dans un syst\u00e8me de s\u00e9curit\u00e9 instrument\u00e9 pendant une longue p\u00e9riode, sans d\u00e9faillance. Cela a \u00e9t\u00e9 correctement document\u00e9. En raison de cette situation, la norme IEC 61508 a ouvert la porte \u00e0 l’utilisation de ces composants (Proven In Use<\/strong>). La IEC 61511 a suivi la m\u00eame approche en d\u00e9finissant le concept de Prior Use Component<\/strong>. Voyons ce concept en d\u00e9tail.<\/p>\n

    PROVEN IN USE<\/h3>\n

    L’id\u00e9e de \u00ab\u00a0Proven in use<\/strong>\u00a0\u00bb vient de l’industrie des proc\u00e9d\u00e9s, o\u00f9 un composant n’a pas de donn\u00e9es de fiabilit\u00e9, mais est largement utilis\u00e9 dans cette application sp\u00e9cifique et le fabricant a rassembl\u00e9 les d\u00e9tails de ses d\u00e9faillances d’une mani\u00e8re structur\u00e9e. Voici la d\u00e9finition :<\/p>\n

    [IEC 61508-4 : 2010] 3.8 Confirmation des mesures de s\u00e9curit\u00e9<\/em><\/strong><\/p>\n

    3.8.18<\/strong> Proven in use.<\/strong>. D\u00e9monstration, sur la base d’une analyse de l’exp\u00e9rience op\u00e9rationnelle pour une configuration sp\u00e9cifique d’un \u00e9l\u00e9ment, que la probabilit\u00e9 de d\u00e9faillances syst\u00e9matiques dangereuses est suffisamment faible pour que chaque fonction de s\u00e9curit\u00e9 qui utilise l’\u00e9l\u00e9ment atteigne le niveau d’int\u00e9grit\u00e9 de s\u00e9curit\u00e9 requis.<\/em><\/p><\/blockquote>\n

    L’utilisation \u00e9prouv\u00e9e est bas\u00e9e sur la base de conception du fabricant<\/strong> (par exemple, limite de temp\u00e9rature, limite de vibration, limite de corrosion, support de maintenance souhait\u00e9) pour son dispositif. Cette d\u00e9finition ne tient pas compte du fait que l’utilisateur, dans son environnement de production<\/strong>, a la capacit\u00e9 de recueillir des donn\u00e9es sur la fiabilit\u00e9 de composants sp\u00e9cifiques. C’est la raison pour laquelle la norme IEC 61511-1, dans son \u00e9dition 2015, a d\u00e9fini les composants \u00ab\u00a0Prior Use\u00a0\u00bb. Il s’agit de la performance install\u00e9e d’un dispositif, dans le cadre d’une application du secteur de la transformation, dans un environnement op\u00e9rationnel sp\u00e9cifique, qui est souvent diff\u00e9rent de la base de conception du fabricant.<\/p>\n

    PRIOR USE<\/h3>\n

    Le concept a \u00e9t\u00e9 introduit dans la deuxi\u00e8me \u00e9dition de la IEC 61511-1<\/strong>, pour permettre \u00e0 un propri\u00e9taire de processus d’utiliser des composants sans les taux de d\u00e9faillance appropri\u00e9s fournis par le fabricant du composant.<\/p>\n

    [IEC 61511-1] 3.2 Termes et d\u00e9finitions<\/strong><\/em><\/p>\n

    3.2.51 Prior use<\/strong>. \u00c9valuation document\u00e9e par un utilisateur selon laquelle un dispositif est adapt\u00e9 \u00e0 une utilisation dans un SIS et peut satisfaire aux exigences d’int\u00e9grit\u00e9 fonctionnelle et de s\u00e9curit\u00e9 requises, sur la base d’une exp\u00e9rience d’exploitation ant\u00e9rieure dans des environnements d’exploitation similaires.<\/em><\/p><\/blockquote>\n

    Une \u00e9valuation de prior use implique la collecte d’informations concernant les performances du dispositif dans un environnement op\u00e9rationnel<\/strong> similaire<\/strong>. Elle d\u00e9montre la fonctionnalit\u00e9 et l’int\u00e9grit\u00e9 du dispositif install\u00e9, y compris les interfaces de processus, le p\u00e9rim\u00e8tre complet du dispositif, les communications et les utilitaires. L’objectif principal de l’\u00e9valuation de prior use est de recueillir des preuves que les d\u00e9faillances syst\u00e9matiques dangereuses<\/strong> ont \u00e9t\u00e9 r\u00e9duites \u00e0 un niveau suffisamment bas par rapport \u00e0 l’int\u00e9grit\u00e9 de s\u00e9curit\u00e9 requise. Les donn\u00e9es relatives \u00e0 l’utilisation ant\u00e9rieure peuvent contribuer \u00e0 une base de donn\u00e9es pour le calcul des taux de d\u00e9faillance du mat\u00e9riel.<\/p>\n

    CONCLUSION<\/strong><\/p>\n

    Pour r\u00e9sumer les concepts de proven in use\u00a0 et de prior use, on peut dire que les crit\u00e8res de Proven In Use<\/strong> sont bas\u00e9s sur les donn\u00e9es d’application renvoy\u00e9es au fabricant<\/strong>, tandis que Prior use <\/strong>concerne les performances des dispositifs install\u00e9s dans le cadre d’une application utilisateur donn\u00e9e dans un environnement d’exploitation sp\u00e9cifique<\/strong>. L’expression \u00ab\u00a0Prior use<\/strong>\u00a0\u00bb a \u00e9t\u00e9 cr\u00e9\u00e9e sp\u00e9cifiquement pour le secteur des proc\u00e9d\u00e9s, afin d’inclure l’exp\u00e9rience op\u00e9rationnelle des appareils. La notion de Proven in use<\/strong> repose principalement sur l’exp\u00e9rience du fabricant et sur les retours d’appareils d\u00e9fectueux.<\/strong><\/p>\n<\/div> <\/div>\n \n \n

    <\/div>\n \n\n <\/div>\n <\/section>\n\n \n","protected":false},"excerpt":{"rendered":"

    LA QUESTION : Quelle est la diff\u00e9rence entre un dispositif Proven in Use\u00a0\u00a0et un dispositif Prior Use\u00a0?<\/p>\n","protected":false},"author":182,"featured_media":37501,"parent":0,"menu_order":4,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tipologia_approfondimento":[155],"class_list":["post-37500","approfondimento","type-approfondimento","status-publish","has-post-thumbnail","hentry","tipologia_approfondimento-securite-des-procedes"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"\n"Proven in Use\u00a0" et "Prior Use\u00a0" - Gt-Engineering<\/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:\/\/www.gt-engineering.it\/fr\/approfondissement\/securite-des-procedes\/proven-in-use-et-proven-in-use\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\""Proven in Use\u00a0" et "Prior Use\u00a0" - 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