{"id":2746,"date":"2024-10-22T14:21:22","date_gmt":"2024-10-22T12:21:22","guid":{"rendered":"https:\/\/ellistat.com\/?p=2746"},"modified":"2024-10-28T08:43:24","modified_gmt":"2024-10-28T07:43:24","slug":"cosa-fare-se-si-ha-un-cattivo-cpc","status":"publish","type":"post","link":"https:\/\/ellistat.com\/it\/que-faire-en-cas-de-mauvais-cpc\/","title":{"rendered":"Cosa devo fare se ricevo un Cpc negativo?"},"content":{"rendered":"<h3 class=\"wp-block-heading\">Che cos'\u00e8 il Cpc:<\/h3>\n\n\n\n<p>Cpc \u00e8 l'acronimo di Control Process Capability. Viene utilizzato per identificare se un processo di controllo \u00e8 in grado di misurare correttamente una caratteristica, ovvero se la dispersione del processo relativa alla ripetibilit\u00e0 e alla riproducibilit\u00e0 \u00e8 accettabile in relazione all'intervallo di tolleranza della caratteristica. Il Cpc \u00e8 misurato da:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><span class=\"wp-katex-eq\" data-display=\"false\">Cpc=\\frac{{testo{intervallo di tolleranza}}{6*{testo{dispersione}}<\/span><\/p>\n\n\n\n<p>Il Cpc \u00e8 considerato come:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Buono se Cpc &lt; 3<\/li>\n\n\n\n<li>Limite se 1 &lt; Cpc &lt; 4<\/li>\n\n\n\n<li>Inaccettabile se Cpc &lt; 4<\/li>\n<\/ul>\n\n\n\n<p>Il Cpc \u00e8 la base di qualsiasi processo di miglioramento. \u00c8 difficile lavorare con le misurazioni se non hanno un grande significato! Ma quando si utilizza il metodo R&amp;R, non \u00e8 raro imbattersi in un Cpc inaccettabile. Come reagire in queste circostanze? Ecco 4 passi da seguire per risolvere un problema di capacit\u00e0 di misura:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Convalidare le modalit\u00e0 di esecuzione del test<\/strong><\/h3>\n\n\n\n<p>Il primo passo consiste nel convalidare il modo in cui \u00e8 stato eseguito il test. \u00c8 necessario verificare che non vi siano valori anomali, che gli operatori siano stati qualificati, che non siano stati inclusi nella ripetibilit\u00e0 difetti di forma, ecc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Identificare le fonti di variabilit\u00e0 intorno ai 5M<\/h3>\n\n\n\n<p>Se la principale fonte di dispersione \u00e8 la ripetibilit\u00e0, dobbiamo utilizzare un albero delle cause per identificare tutte le fonti di questa variabilit\u00e0 intorno alle 5M del processo di misura (Dispositivo di misura, Mezzo, Metodo, Mezzi, Manodopera). Cerchiamo poi di congelare il maggior numero possibile di parametri, come il luogo di misura sul prodotto, le condizioni ambientali, ecc. anche se ci\u00f2 significa che non sono pi\u00f9 rappresentativi della misura in produzione.<\/p>\n\n\n\n<p>Se il congelamento di questi parametri ripristina un Cpc accettabile, allora \u00e8 possibile indagare ulteriormente per trovare la vera causa della dispersione ed eventualmente ripristinare un processo in grado di produrre. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ripetere le misure pi\u00f9 volte<\/h3>\n\n\n\n<p>Se l'errore di ripetibilit\u00e0 \u00e8 elevato, anche se \u00e8 stato impostato il parametro massimo, la situazione pu\u00f2 essere migliorata ripetendo le misurazioni pi\u00f9 volte e prendendo la media di diverse misurazioni. Facendo la media di n misurazioni, il Cpc viene moltiplicato per <span class=\"wp-katex-eq\" data-display=\"false\">\\sqrt{n}<\/span>.<\/p>\n\n\n\n<p class=\"has-very-light-gray-background-color has-background\">\u26a0\ufe0fAttention In questo caso, tuttavia, \u00e8 necessario utilizzare in produzione la stessa procedura di misurazione utilizzata per il test R&amp;R.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Osservare le differenze di gestione tra gli operatori<\/h3>\n\n\n\n<p>Nel caso di un elevato livello di errore di riproducibilit\u00e0, \u00e8 generalmente necessario osservare le differenze di gestione tra i vari operatori e formalizzare la procedura di controllo in modo inequivocabile. In questo caso, \u00e8 necessario prevedere una formazione degli operatori.<\/p>","protected":false},"excerpt":{"rendered":"<p>Qu&rsquo;est-ce que le Cpc: Cpc signifie Capabilit\u00e9 du Processus de Contr\u00f4le. Il permet d&rsquo;identifier sur un processus de contr\u00f4le est capable de mesurer correctement une caract\u00e9ristique, c&rsquo;est \u00e0 dire que la dispersion du processus li\u00e9 \u00e0 la r\u00e9p\u00e9tabilit\u00e9 et la reproductibilit\u00e9 est acceptable par rapport \u00e0 l&rsquo;intervalle de tol\u00e9rance de la caract\u00e9ristique. On mesure le [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2747,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-analysis"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Que faire en cas de mauvais Cpc ? - Ellistat<\/title>\n<meta name=\"description\" content=\"Le Cpc est la base de toute d\u00e9marche d&#039;am\u00e9lioration. Comment doit-on r\u00e9agir dans les conditions d&#039;un Cpc inacceptable ?\" \/>\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\/it\/cosa-fare-se-si-ha-un-cattivo-cpc\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Que faire en cas de mauvais Cpc ? - Ellistat\" \/>\n<meta property=\"og:description\" content=\"Le Cpc est la base de toute d\u00e9marche d&#039;am\u00e9lioration. Comment doit-on r\u00e9agir dans les conditions d&#039;un Cpc inacceptable ?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ellistat.com\/it\/cosa-fare-se-si-ha-un-cattivo-cpc\/\" \/>\n<meta property=\"og:site_name\" content=\"Ellistat\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-22T12:21:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-10-28T07:43:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"851\" \/>\n\t<meta property=\"og:image:height\" content=\"315\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Camille Forest\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Camille Forest\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/\"},\"author\":{\"name\":\"Camille Forest\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/#\\\/schema\\\/person\\\/b757d2fa4e8a73814cb00474e7653681\"},\"headline\":\"Que faire en cas de mauvais Cpc ?\",\"datePublished\":\"2024-10-22T12:21:22+00:00\",\"dateModified\":\"2024-10-28T07:43:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/\"},\"wordCount\":525,\"image\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/uploads\\\/Sans-titre-Couverture-Facebook-2.png\",\"articleSection\":[\"Data Analysis\"],\"inLanguage\":\"it-IT\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/\",\"url\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/\",\"name\":\"Que faire en cas de mauvais Cpc ? - Ellistat\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/uploads\\\/Sans-titre-Couverture-Facebook-2.png\",\"datePublished\":\"2024-10-22T12:21:22+00:00\",\"dateModified\":\"2024-10-28T07:43:24+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/#\\\/schema\\\/person\\\/b757d2fa4e8a73814cb00474e7653681\"},\"description\":\"Le Cpc est la base de toute d\u00e9marche d'am\u00e9lioration. Comment doit-on r\u00e9agir dans les conditions d'un Cpc inacceptable ?\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#primaryimage\",\"url\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/uploads\\\/Sans-titre-Couverture-Facebook-2.png\",\"contentUrl\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/uploads\\\/Sans-titre-Couverture-Facebook-2.png\",\"width\":851,\"height\":315,\"caption\":\"Un Cpc est la base de toute d\u00e9marche d'am\u00e9lioration\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/que-faire-en-cas-de-mauvais-cpc\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/ellistat.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Data Analysis\",\"item\":\"https:\\\/\\\/ellistat.com\\\/category\\\/data-analysis\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Que faire en cas de mauvais Cpc ?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/#website\",\"url\":\"https:\\\/\\\/ellistat.com\\\/\",\"name\":\"Ellistat\",\"description\":\"La suite qualit\u00e9 de l&#039;industrie m\u00e9canique\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ellistat.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"it-IT\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/#\\\/schema\\\/person\\\/b757d2fa4e8a73814cb00474e7653681\",\"name\":\"Camille Forest\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/litespeed\\\/avatar\\\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859\",\"url\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/litespeed\\\/avatar\\\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859\",\"contentUrl\":\"https:\\\/\\\/ellistat.com\\\/wp-content\\\/litespeed\\\/avatar\\\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859\",\"caption\":\"Camille Forest\"},\"url\":\"https:\\\/\\\/ellistat.com\\\/it\\\/author\\\/camille-forest\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Cosa devo fare se ho un cattivo Cpc? - Ellistat","description":"Il PCC \u00e8 la base di qualsiasi processo di miglioramento. Come reagire a un CPP inaccettabile?","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ellistat.com\/it\/cosa-fare-se-si-ha-un-cattivo-cpc\/","og_locale":"it_IT","og_type":"article","og_title":"Que faire en cas de mauvais Cpc ? - Ellistat","og_description":"Le Cpc est la base de toute d\u00e9marche d'am\u00e9lioration. Comment doit-on r\u00e9agir dans les conditions d'un Cpc inacceptable ?","og_url":"https:\/\/ellistat.com\/it\/cosa-fare-se-si-ha-un-cattivo-cpc\/","og_site_name":"Ellistat","article_published_time":"2024-10-22T12:21:22+00:00","article_modified_time":"2024-10-28T07:43:24+00:00","og_image":[{"width":851,"height":315,"url":"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png","type":"image\/png"}],"author":"Camille Forest","twitter_card":"summary_large_image","twitter_misc":{"Scritto da":"Camille Forest","Tempo di lettura stimato":"3 minuti"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#article","isPartOf":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/"},"author":{"name":"Camille Forest","@id":"https:\/\/ellistat.com\/#\/schema\/person\/b757d2fa4e8a73814cb00474e7653681"},"headline":"Que faire en cas de mauvais Cpc ?","datePublished":"2024-10-22T12:21:22+00:00","dateModified":"2024-10-28T07:43:24+00:00","mainEntityOfPage":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/"},"wordCount":525,"image":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#primaryimage"},"thumbnailUrl":"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png","articleSection":["Data Analysis"],"inLanguage":"it-IT"},{"@type":"WebPage","@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/","url":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/","name":"Cosa devo fare se ho un cattivo Cpc? - Ellistat","isPartOf":{"@id":"https:\/\/ellistat.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#primaryimage"},"image":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#primaryimage"},"thumbnailUrl":"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png","datePublished":"2024-10-22T12:21:22+00:00","dateModified":"2024-10-28T07:43:24+00:00","author":{"@id":"https:\/\/ellistat.com\/#\/schema\/person\/b757d2fa4e8a73814cb00474e7653681"},"description":"Il PCC \u00e8 la base di qualsiasi processo di miglioramento. Come reagire a un CPP inaccettabile?","breadcrumb":{"@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#breadcrumb"},"inLanguage":"it-IT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/"]}]},{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#primaryimage","url":"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png","contentUrl":"https:\/\/ellistat.com\/wp-content\/uploads\/Sans-titre-Couverture-Facebook-2.png","width":851,"height":315,"caption":"Un Cpc est la base de toute d\u00e9marche d'am\u00e9lioration"},{"@type":"BreadcrumbList","@id":"https:\/\/ellistat.com\/que-faire-en-cas-de-mauvais-cpc\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/ellistat.com\/"},{"@type":"ListItem","position":2,"name":"Data Analysis","item":"https:\/\/ellistat.com\/category\/data-analysis\/"},{"@type":"ListItem","position":3,"name":"Que faire en cas de mauvais Cpc ?"}]},{"@type":"WebSite","@id":"https:\/\/ellistat.com\/#website","url":"https:\/\/ellistat.com\/","name":"Ellistat","description":"La suite della qualit\u00e0 per l'industria meccanica","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ellistat.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"it-IT"},{"@type":"Person","@id":"https:\/\/ellistat.com\/#\/schema\/person\/b757d2fa4e8a73814cb00474e7653681","name":"Foresta di Camille","image":{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/ellistat.com\/wp-content\/litespeed\/avatar\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859","url":"https:\/\/ellistat.com\/wp-content\/litespeed\/avatar\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859","contentUrl":"https:\/\/ellistat.com\/wp-content\/litespeed\/avatar\/54873af0f2f4be7f109d4c67b3706390.jpg?ver=1776880859","caption":"Camille Forest"},"url":"https:\/\/ellistat.com\/it\/author\/camille-forest\/"}]}},"_links":{"self":[{"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/posts\/2746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/comments?post=2746"}],"version-history":[{"count":4,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/posts\/2746\/revisions"}],"predecessor-version":[{"id":2860,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/posts\/2746\/revisions\/2860"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/media\/2747"}],"wp:attachment":[{"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/media?parent=2746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/categories?post=2746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ellistat.com\/it\/wp-json\/wp\/v2\/tags?post=2746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}