{"id":3878,"date":"2021-06-27T15:53:44","date_gmt":"2021-06-27T14:53:44","guid":{"rendered":"https:\/\/safetyandsis.com\/probabilidad-de-fallo\/"},"modified":"2025-12-21T09:29:11","modified_gmt":"2025-12-21T08:29:11","slug":"probabilidad-de-fallo","status":"publish","type":"post","link":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/","title":{"rendered":"Probabilidad de fallo"},"content":{"rendered":"

\n <\/p>\n

Probabilidad de fallo<\/strong><\/h2>\n

<\/p>\n

\n <\/p>\n

\u00bfEs muy importante calcular con mucha precisi\u00f3n la probabilidad de fallo media \u201cPFDavg<\/strong>\u201d de una Funci\u00f3n Instrumentada de Seguridad<\/a>? La respuesta corta es \u201cNO<\/strong>\u201d, y vamos a tratar de explicarlo a continuaci\u00f3n. <\/p>\n

<\/p>\n

\n <\/p>\n

Lo primero que hay que decir es que la Seguridad Funcional es mucho m\u00e1s que el cumplimiento de la probabilidad de fallo. La IEC 61511 define el llamado \u201cciclo de vida\u201d del Sistema Instrumentado de Seguridad (SIS) donde encontramos numerosas etapas y conceptos muy importantes (SRS, Dise\u00f1o, FAT, SAT, Verificaci\u00f3n, Validaci\u00f3n, Gesti\u00f3n de la Seguridad, Mantenimiento, fallos hardware y fallos sistem\u00e1ticos, etc.) <\/p>\n

<\/p>\n

\n <\/p>\n

Respecto al producto en s\u00ed mismo hay dos requerimientos, uno es la Capacidad Sistem\u00e1tica<\/strong> (producto certificado, \u201cproven in use\u201d o \u201cprior use\u201d) y el otro es el requerimiento de la probabilidad de fallo del que trata este art\u00edculo. Hay un tercer requisito, llamado de Restricciones de Arquitectura<\/strong>, que tiene que ver con el dise\u00f1o de la Funci\u00f3n Instrumentada de Seguridad (SIF) en cuanto a cu\u00e1l debe ser su redundancia m\u00ednima (1oo1, 1oo2, 2oo3, \u2026). <\/p>\n

<\/p>\n

\n <\/p>\n

Par\u00e1metros de c\u00e1lculo<\/strong><\/h4>\n

<\/p>\n

\n <\/p>\n

Para calcular la PFDavg o PFH utilizamos una serie de par\u00e1metros<\/a>, algunos de ellos impactan muy significativamente en el resultado como las tasas de fallo, el valor de PTC (\u201cproof test coverage\u201d) y el factor Beta utilizado en las arquitecturas redundantes (1oo2, 2oo3,\u2026)<\/p>\n

<\/p>\n

\n <\/p>\n

No suele ser sencillo definir con cierto rigor estos tres par\u00e1metros:<\/p>\n

<\/p>\n

\n <\/p>\n

\u2013Tasas de fallo<\/strong>: \u00bfSon fiables los valores que estoy utilizando? \u00bfCu\u00e1l es su procedencia? \u00bfSon valores v\u00e1lidos para las condiciones de operaci\u00f3n de la planta y para el tipo de servicio \u201csevero\u201d de algunas de las SIFs? Si no son fiables lo recomendable es multiplicarlos por un factor entre 2 y 5. <\/p>\n

<\/p>\n

\n <\/p>\n

\u2013Proof Test Coverage (PTC)<\/strong>: Este par\u00e1metro mide cu\u00e1ntos fallos somos capaces de detectar al realizar las pruebas de mantenimiento. A menudo se desprecia este valor asumiendo que es 100% lo que en la pr\u00e1ctica es imposible. Muchos de los fallos est\u00e1n \u201cocultos\u201d y no se detectan. Un valor t\u00edpico para una v\u00e1lvula es 70% o incluso menos. Este factor debe facilitarlo el fabricante del producto. Una variaci\u00f3n de s\u00f3lo un 3% en este par\u00e1metro puede tener un impacto grande en el resultado de PFDavg. \u00bfQu\u00e9 tipo de pruebas vamos a hacer? \u00bfEstamos seguros de que las vamos a hacer completas para cumplir el valor de PTC definido? <\/p>\n

<\/p>\n

\n <\/p>\n

\u2013Factor Beta:<\/strong> Este factor cuantifica los posibles fallos de causa com\u00fan en las arquitecturas redundantes como 1oo2 o 2oo3. Por defecto se utilizan valores de 5%\/2%\/10% para el sensor\/logic solver\/actuador. <\/p>\n

<\/p>\n

\n <\/p>\n

En las siguientes tablas se muestran ejemplos para entender el enorme impacto que tienen estos par\u00e1metros al calcular la PFDavg:<\/p>\n

<\/p>\n

Tabla 1: Suponemos las mismas tasas de fallos DD y DU =800 FITS (TI=1 a\u00f1o; MTTR=48h.)<\/strong><\/p>\n

\n <\/p>\n

<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n
Final Element<\/strong><\/th>\n

<\/p>\n

PTC<\/strong><\/th>\n

<\/p>\n

Beta<\/strong><\/th>\n

<\/p>\n

PFDavg<\/strong><\/th>\n

<\/p>\n

SIL achieved<\/strong><\/th>\n

<\/p>\n

Result<\/strong><\/th>\n

\n<\/tr>\n

\n<\/thead>\n

<\/p>\n

1oo1<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

NA<\/td>\n

<\/p>\n

3.50E-03<\/td>\n

<\/p>\n

SIL-2<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo1<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

NA<\/td>\n

<\/p>\n

1.82E-02<\/strong><\/td>\n

<\/p>\n

SIL-1<\/td>\n

<\/p>\n

Realistic<\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

0%<\/td>\n

<\/p>\n

1.64E-05<\/td>\n

<\/p>\n

SIL-4<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

5%<\/td>\n

<\/p>\n

1.91E-04<\/td>\n

<\/p>\n

SIL-3<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

0%<\/td>\n

<\/p>\n

3.41E-04<\/td>\n

<\/p>\n

SIL-3<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

5%<\/td>\n

<\/p>\n

1.23E-03<\/strong><\/td>\n

<\/p>\n

SIL-2<\/td>\n

<\/p>\n

Realistic<\/td>\n

\n<\/tr>\n

\n<\/tbody>\n

\n<\/table>\n

\n<\/p><\/div>\n

\n <\/p>\n

\n <\/p>\n

Tabla 2: Suponemos la mitad de fallos DD y DU =400 FITS (TI=1 a\u00f1o; MTTR=48h.)<\/strong><\/p>\n

\n <\/p>\n

<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n
Final Element<\/strong><\/th>\n

<\/p>\n

PTC<\/strong><\/th>\n

<\/p>\n

Beta<\/strong><\/th>\n

<\/p>\n

PFDavg<\/strong><\/th>\n

<\/p>\n

SIL achieved<\/strong><\/th>\n

<\/p>\n

Result<\/strong><\/th>\n

\n<\/tr>\n

\n<\/thead>\n

<\/p>\n

1oo1<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

NA<\/td>\n

<\/p>\n

1.75E-03<\/td>\n

<\/p>\n

SIL-2<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo1<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

NA<\/td>\n

<\/p>\n

9.11E-0<\/strong>3<\/td>\n

<\/p>\n

SIL-2<\/td>\n

<\/p>\n

Realistic<\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

0%<\/td>\n

<\/p>\n

4.11E-06<\/td>\n

<\/p>\n

SIL-4<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

100%<\/td>\n

<\/p>\n

5%<\/td>\n

<\/p>\n

9,15E-05<\/td>\n

<\/p>\n

SIL-4<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

0%<\/td>\n

<\/p>\n

8.52E-05<\/td>\n

<\/p>\n

SIL-4<\/td>\n

<\/p>\n

Not realistic<\/span><\/td>\n

\n<\/tr>\n

<\/p>\n

1oo2<\/td>\n

<\/p>\n

70%<\/td>\n

<\/p>\n

5%<\/td>\n

<\/p>\n

5.36E-04<\/strong><\/td>\n

<\/p>\n

SIL-3<\/td>\n

<\/p>\n

Realistic<\/td>\n

\n<\/tr>\n

\n<\/tbody>\n

\n<\/table>\n

\n<\/p><\/div>\n

\n <\/p>\n

\n <\/p>\n

\n <\/p>\n

Una desviaci\u00f3n peque\u00f1a en estos par\u00e1metros introduce mucho m\u00e1s error en el c\u00e1lculo de la PFDavg que el posible error que podemos cometer por utilizar una herramienta de c\u00e1lculo menos compleja.<\/p>\n

<\/p>\n

\n <\/p>\n

\u00bfEs lo mismo PFDavg = 3.77E-03 que 3.40E-03? El valor no es el mismo, pero desde un punto de vista pr\u00e1ctico la diferencia no es tan relevante. \u00bfPor qu\u00e9? Por lo dicho anteriormente, porque este error en el c\u00e1lculo de la probabilidad de fallo<\/strong> es insignificante comparado con el error que hemos cometido al utilizar par\u00e1metros poco rigurosos o de dudosa procedencia.<\/strong> <\/p>\n

<\/p>\n

\n <\/p>\n

La norma IEC 61511 no obliga a utilizar ninguna herramienta certificada para realizar estos c\u00e1lculos de verificaci\u00f3n del SIL, pueden incluso hacerse manualmente o con una hoja de c\u00e1lculo. Es m\u00e1s importante manejar bien los conceptos<\/strong>, seleccionar correctamente los par\u00e1metros y utilizar f\u00f3rmulas<\/strong> completas donde intervengan los par\u00e1metros principales, en especial PTC y Beta. <\/p>\n

<\/p>\n

\n <\/p>\n

Como complemento a este art\u00edculo os invitamos a leer este informe<\/a>.<\/p>\n

<\/p>\n

\n <\/p>\n

Art\u00edculos relacionados:<\/p>\n

<\/p>\n

\n <\/p>\n

Comparar SILcet con exSILentia \u2013 Seguridad Funcional (safetyandsis.com)<\/a><\/p>\n

<\/p>\n

\n <\/p>\n

Vuelta a lo b\u00e1sico 16 – PFDavg | exida<\/a><\/p>\n

<\/p>\n

\n <\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[158,168,186],"tags":[],"class_list":["post-3878","post","type-post","status-publish","format-standard","hentry","category-actuador-es","category-probabilidad-es","category-sif-es-2"],"yoast_head":"\nProbabilidad de fallo — Seguridad Funcional<\/title>\n<meta name=\"description\" content=\"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Probabilidad de fallo %\" \/>\n<meta property=\"og:description\" content=\"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/\" \/>\n<meta property=\"og:site_name\" content=\"Seguridad Funcional\" \/>\n<meta property=\"article:published_time\" content=\"2021-06-27T14:53:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-21T08:29:11+00:00\" \/>\n<meta name=\"author\" content=\"Enertria\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Probabilidad de fallo\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/\"},\"author\":{\"name\":\"Enertria\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#\\\/schema\\\/person\\\/8cbe0b108f350d161805c143258aa7ee\"},\"headline\":\"Probabilidad de fallo\",\"datePublished\":\"2021-06-27T14:53:44+00:00\",\"dateModified\":\"2025-12-21T08:29:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/\"},\"wordCount\":932,\"publisher\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#organization\"},\"articleSection\":[\"Actuador\",\"Probabilidad\",\"SIF\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/\",\"url\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/\",\"name\":\"Probabilidad de fallo — Seguridad Funcional\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#website\"},\"datePublished\":\"2021-06-27T14:53:44+00:00\",\"dateModified\":\"2025-12-21T08:29:11+00:00\",\"description\":\"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/probabilidad-de-fallo\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/safetyandsis.com\\\/es\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Probabilidad de fallo\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#website\",\"url\":\"https:\\\/\\\/safetyandsis.com\\\/\",\"name\":\"Functional Safety\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/safetyandsis.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#organization\",\"name\":\"Enertria\",\"url\":\"https:\\\/\\\/safetyandsis.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/safetyandsis.com\\\/\\\/wp-content\\\/uploads\\\/logo-safetyandsis-h-f.webp\",\"contentUrl\":\"https:\\\/\\\/safetyandsis.com\\\/\\\/wp-content\\\/uploads\\\/logo-safetyandsis-h-f.webp\",\"width\":225,\"height\":160,\"caption\":\"Enertria\"},\"image\":{\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/safetyandsis.com\\\/#\\\/schema\\\/person\\\/8cbe0b108f350d161805c143258aa7ee\",\"name\":\"Enertria\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Probabilidad de fallo — Seguridad Funcional","description":"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.","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:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/","og_locale":"es_ES","og_type":"article","og_title":"Probabilidad de fallo %","og_description":"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.","og_url":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/","og_site_name":"Seguridad Funcional","article_published_time":"2021-06-27T14:53:44+00:00","article_modified_time":"2025-12-21T08:29:11+00:00","author":"Enertria","twitter_card":"summary_large_image","twitter_title":"Probabilidad de fallo","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/#article","isPartOf":{"@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/"},"author":{"name":"Enertria","@id":"https:\/\/safetyandsis.com\/#\/schema\/person\/8cbe0b108f350d161805c143258aa7ee"},"headline":"Probabilidad de fallo","datePublished":"2021-06-27T14:53:44+00:00","dateModified":"2025-12-21T08:29:11+00:00","mainEntityOfPage":{"@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/"},"wordCount":932,"publisher":{"@id":"https:\/\/safetyandsis.com\/#organization"},"articleSection":["Actuador","Probabilidad","SIF"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/","url":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/","name":"Probabilidad de fallo — Seguridad Funcional","isPartOf":{"@id":"https:\/\/safetyandsis.com\/#website"},"datePublished":"2021-06-27T14:53:44+00:00","dateModified":"2025-12-21T08:29:11+00:00","description":"Comprenda el c\u00e1lculo del PFDavg para los SIF y por qu\u00e9 una medici\u00f3n precisa puede no ser tan importante como cree.","breadcrumb":{"@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/safetyandsis.com\/es\/probabilidad-de-fallo\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/safetyandsis.com\/es\/"},{"@type":"ListItem","position":2,"name":"Probabilidad de fallo"}]},{"@type":"WebSite","@id":"https:\/\/safetyandsis.com\/#website","url":"https:\/\/safetyandsis.com\/","name":"Functional Safety","description":"","publisher":{"@id":"https:\/\/safetyandsis.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/safetyandsis.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/safetyandsis.com\/#organization","name":"Enertria","url":"https:\/\/safetyandsis.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/safetyandsis.com\/#\/schema\/logo\/image\/","url":"https:\/\/safetyandsis.com\/\/wp-content\/uploads\/logo-safetyandsis-h-f.webp","contentUrl":"https:\/\/safetyandsis.com\/\/wp-content\/uploads\/logo-safetyandsis-h-f.webp","width":225,"height":160,"caption":"Enertria"},"image":{"@id":"https:\/\/safetyandsis.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/safetyandsis.com\/#\/schema\/person\/8cbe0b108f350d161805c143258aa7ee","name":"Enertria"}]}},"_links":{"self":[{"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/posts\/3878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/comments?post=3878"}],"version-history":[{"count":8,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/posts\/3878\/revisions"}],"predecessor-version":[{"id":4462,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/posts\/3878\/revisions\/4462"}],"wp:attachment":[{"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/media?parent=3878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/categories?post=3878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/safetyandsis.com\/es\/wp-json\/wp\/v2\/tags?post=3878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}