{"id":5483,"date":"2014-06-10T07:51:24","date_gmt":"2014-06-10T06:51:24","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=5483"},"modified":"2019-12-31T11:14:27","modified_gmt":"2019-12-31T10:14:27","slug":"indisponibilite-dun-site-utilisateur-quelles-strategies-repli","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2014\/06\/indisponibilite-dun-site-utilisateur-quelles-strategies-repli\/","title":{"rendered":"Indisponibilit\u00e9 d\u2019un site utilisateur : quelle(s) strat\u00e9gie(s) de repli ?"},"content":{"rendered":"<p><em>Face \u00e0 l\u2019indisponibilit\u00e9 d\u2019un site utilisateur, les r\u00e9ponses des Plans de Continuit\u00e9 d\u2019Activit\u00e9 s\u2019appuient sur des strat\u00e9gies diverses. Si le d\u00e9port d\u2019activit\u00e9 peut permettre de r\u00e9pondre \u00e0 des crises courtes, il doit \u00eatre en revanche bien encadr\u00e9 du point de vue RH, notamment en raison des impacts en termes de charge sur les collaborateurs concern\u00e9s. La solution de type \u00ab\u00a0Dual Office\u00a0\u00bb constitue \u00e9galement une strat\u00e9gie int\u00e9ressante. Elle sous-entend cependant la prise en compte de la continuit\u00e9 d\u2019activit\u00e9 d\u00e8s la construction op\u00e9rationnelle du processus M\u00e9tier. Le PCA ne devient plus une t\u00e2che ponctuelle, il est une partie int\u00e9grante du M\u00e9tier de l\u2019organisation, d\u00e8s sa conception. Enfin, la solution traditionnelle reste la plus r\u00e9pondue\u00a0: une strat\u00e9gie de repli sur un ou plusieurs sites alternatifs permettant la reprise progressive des activit\u00e9s m\u00e9tiers en commen\u00e7ant par les plus vitales.<\/em><\/p>\n<p><em>Comment construire sa strat\u00e9gie de repli\u00a0? Quelles solutions retenir ?<\/em><\/p>\n<h2>Conna\u00eetre ses M\u00e9tiers critiques<\/h2>\n<p>Il est tout d\u2019abord n\u00e9cessaire de r\u00e9aliser un <a title=\"ISO 22301 : un nouvel \u00e9lan pour la Continuit\u00e9 d\u2019Activit\u00e9 ?\" href=\"http:\/\/www.solucominsight.fr\/2011\/09\/iso-22301-un-nouvel-elan-pour-la-continuite-d%e2%80%99activite\/\">Bilan d\u2019Impact d\u2019Activit\u00e9<\/a> (<i>Business Impact Analysis<\/i> ou BIA), qui permettra de\u00a0cartographier les activit\u00e9s M\u00e9tiers (notamment en les localisant g\u00e9ographiquement), quantifier l\u2019impact de l\u2019interruption de ces activit\u00e9s dans le temps sur un r\u00e9f\u00e9rentiel partag\u00e9 (Le BIA permet donc la d\u00e9finition d\u2019un chronogramme de reprise des activit\u00e9s du site en cas de sinistre), et enfin de conna\u00eetre les sp\u00e9cificit\u00e9s op\u00e9rationnelles des M\u00e9tiers afin d\u2019identifier les contraintes techniques qui devront \u00eatre prises en compte lors d\u2019un \u00e9ventuel repli\u00a0(poste de travail sp\u00e9cifique, t\u00e9l\u00e9phonie enregistr\u00e9e, \u00e9quipement call-center pour les centres de relation client, lecteur de ch\u00e8ques, \u2026)<\/p>\n<h2>Identifier exhaustivement les solutions \u00e0 envisager<\/h2>\n<p>Une multitude de solutions permettant un repli de collaborateurs existent \u00e0 l\u2019heure actuelle\u00a0:<\/p>\n<ul>\n<li>Site de repli <b>interne d\u00e9di\u00e9\u00a0<\/b>: b\u00e2timent poss\u00e9d\u00e9 par l\u2019organisation et d\u00e9di\u00e9 au PCA<\/li>\n<li>Site de repli <b>externe<\/b>, au travers de positions de travail lou\u00e9es et utilis\u00e9es en cas de crise, selon 2 mod\u00e8les de location : positions d\u00e9di\u00e9es au souscripteur, positions mutualis\u00e9es entre plusieurs clients (cette derni\u00e8re soulevant le risque de non obtention du volume de position souscrites en cas de choc extr\u00eame touchant simultan\u00e9ment plusieurs structures)<\/li>\n<li><b>Repli crois\u00e9<\/b>\u00a0entre les sites de l\u2019organisation : r\u00e9quisition de bureaux disponibles et des salles de r\u00e9union des b\u00e2timents non sinistr\u00e9s et d\u00e9ploiement de postes de travail aux collaborateurs repli\u00e9s par l\u2019organisation.<\/li>\n<li><b>Le Nomadisme ou travail \u00e0 distance<\/b>, gr\u00e2ce \u00e0 des solutions appropri\u00e9es permettant aux collaborateurs de travailler de chez eux (postes nomades, acc\u00e8s distants au SI, etc.). Cette solution de repli est relativement bien adapt\u00e9e aux m\u00e9tiers \u00ab\u00a0pr\u00e9dispos\u00e9s\u00a0\u00bb au travail \u00e0 distance, avec une faible sp\u00e9cificit\u00e9 op\u00e9rationnelle (par ex. les populations commerciales.<\/li>\n<\/ul>\n<h2>La strat\u00e9gie de repli\u00a0: un portefeuille de solutions \u00e0 orchestrer<\/h2>\n<p>La confrontation\u00a0des solutions de repli (capacit\u00e9 d\u2019activation dans le temps, contraintes techniques)\u00a0au BIA (chronogramme de reprise, sp\u00e9cificit\u00e9s op\u00e9rationnelles) va permettre la conception d\u2019une strat\u00e9gie globale constitu\u00e9e de la combinaison de solutions unitaires, adapt\u00e9es \u00e0 un contexte, des contraintes M\u00e9tiers et des contraintes de l\u2019organisation. Cette association en un portefeuille de solutions permet de r\u00e9pondre efficacement aux enjeux de la reprise d\u2019activit\u00e9s.<\/p>\n<p>On peut donc, par exemple, envisager une \u00ab\u00a0fus\u00e9e \u00e0 2 \u00e9tages\u00a0\u00bb.<\/p>\n<h4>Les activit\u00e9s critiques, dont la reprise tr\u00e8s rapide est vitale (reprise en moins de 48h)<\/h4>\n<p>En g\u00e9n\u00e9ral, la reprise de ces activit\u00e9s s\u2019envisage sur un <b>site d\u00e9di\u00e9 <\/b>et <b>d\u00e9j\u00e0 pr\u00e9par\u00e9 <\/b>(postes de travail, raccordement r\u00e9seau, t\u00e9l\u00e9phonie), sur un site de l\u2019organisation ou chez un prestataire.<\/p>\n<p>On peut notamment penser \u00e0 des activit\u00e9s de front office, de <em>call center<\/em>, ou encore de fonctions supports tr\u00e8s sensibles, alliant au besoin de reprise fort des contraintes op\u00e9rationnelles complexes \u00e0 mettre en \u0153uvre rapidement (stations de travail scientifique, t\u00e9l\u00e9phonie enregistr\u00e9e).<\/p>\n<h4>Les activit\u00e9s moyennement critiques (reprise \u00e0 partir de 48h) et les activit\u00e9s non critiques (reprise au-del\u00e0 de 1 \u00e0 2 semaines<\/h4>\n<p>Le panel de solutions est large\u00a0: si le <b>repli chez des prestataires<\/b> reste d\u2019actualit\u00e9, on peut dor\u00e9navant penser \u00e0 des solutions moins couteuses, mais n\u00e9cessitant un certain temps de d\u00e9ploiement op\u00e9rationnel\u00a0: <b>repli crois\u00e9<\/b>, <b>nomadisme<\/b> ou encore <b>d\u00e9port d\u2019activit\u00e9. <\/b>Il est toutefois important de prendre en compte un certain nombre de contraintes lorsque l\u2019on se tourne vers des solutions \u00ab\u00a0internes\u00a0\u00bb\u00a0 (acc\u00e8s r\u00e9seau, fourniture de postes de travail, \u2026).<\/p>\n<p>Cette premi\u00e8re r\u00e9flexion permettra de donner naissance \u00e0 plusieurs sc\u00e9narios de repli, qu\u2019il conviendra d\u2019\u00e9valuer selon des crit\u00e8res choisis\u00a0: co\u00fbts de la solution de continuit\u00e9<b> <\/b>(investissement, co\u00fbt r\u00e9current de maintenance annuelle), capacit\u00e9 \u00e0 r\u00e9pondre au besoin (reprise des activit\u00e9s techniques, capacit\u00e9 d\u2019activation, \u2026), couverture de risque<b>\u00a0<\/b>: capacit\u00e9 \u00e0 \u00eatre utilisable sur plusieurs sc\u00e9narios de risques (par ex. perte d\u2019un b\u00e2timent, pand\u00e9mie, \u2026), complexit\u00e9 de mise en \u0153uvre de la solution de repli, maintien en conditions op\u00e9rationnelles (MCO) (complexit\u00e9 et charge du MCO, maintien de la situation dans le temps, \u2026), testabilit\u00e9 de la solution<b> <\/b>(bascule, ouvertures des acc\u00e8s, \u2026)<\/p>\n<p>A titre d\u2019exemple, on peut imaginer les analyses comparatives repr\u00e9sent\u00e9es ci-dessous :<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-5485\" src=\"http:\/\/www.solucominsight.fr\/wp-content\/uploads\/2014\/06\/analyse-comparative-selon-les-d\u00e9lais-de-reprise.png\" alt=\"analyse comparative selon les d\u00e9lais de reprise\" width=\"453\" height=\"332\" srcset=\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/06\/analyse-comparative-selon-les-d\u00e9lais-de-reprise.png 453w, https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/06\/analyse-comparative-selon-les-d\u00e9lais-de-reprise-261x191.png 261w, https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2014\/06\/analyse-comparative-selon-les-d\u00e9lais-de-reprise-53x39.png 53w\" sizes=\"auto, (max-width: 453px) 100vw, 453px\" \/><\/p>\n<p>Enfin, dans le cadre de la mise en place d\u2019une solution s\u2019appuyant sur du repli, un point d\u2019attention est \u00e0 prendre en compte\u00a0: la d\u00e9finition de <a title=\"Continuit\u00e9 d\u2019activit\u00e9 : n\u2019oubliez pas d\u2019impliquer les ressources humaines !\" href=\"http:\/\/www.solucominsight.fr\/2012\/09\/continuite-dactivite-noubliez-pas-dimpliquer-les-ressources-humaines\/\" target=\"_blank\" rel=\"noopener noreferrer\">modalit\u00e9s RH<\/a>. En effet, les conditions de travail des collaborateurs se trouvant modifi\u00e9es, il est n\u00e9cessaire de d\u00e9finir un cadre dans lequel s\u2019inscrire en situation de crise.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Face \u00e0 l\u2019indisponibilit\u00e9 d\u2019un site utilisateur, les r\u00e9ponses des Plans de Continuit\u00e9 d\u2019Activit\u00e9 s\u2019appuient sur des strat\u00e9gies diverses. Si le d\u00e9port d\u2019activit\u00e9 peut permettre de r\u00e9pondre \u00e0 des crises courtes, il doit \u00eatre en revanche bien encadr\u00e9 du point de&#8230;<\/p>\n","protected":false},"author":19,"featured_media":6143,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3222,36],"tags":[131,3304,447],"coauthors":[928,1615],"class_list":["post-5483","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cyberrisk-management-strategy","category-cybersecurity-digital-trust","tag-pca","tag-risk-management-strategy-governance","tag-strategie"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Indisponibilit\u00e9 d\u2019un site utilisateur : quelle(s) strat\u00e9gie(s) de repli ? - RiskInsight<\/title>\n<meta name=\"description\" content=\"Face \u00e0 l\u2019indisponibilit\u00e9 d\u2019un site utilisateur, les r\u00e9ponses des Plans de Continuit\u00e9 d\u2019Activit\u00e9 s\u2019appuient sur des strat\u00e9gies diverses. 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