{"id":3897,"date":"2013-07-05T10:16:31","date_gmt":"2013-07-05T09:16:31","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=3897"},"modified":"2015-01-21T09:53:28","modified_gmt":"2015-01-21T08:53:28","slug":"le-cloud-une-revolution-pour-la-dsi","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2013\/07\/le-cloud-une-revolution-pour-la-dsi\/","title":{"rendered":"Le Cloud computing : vers une DSI orient\u00e9e service ?"},"content":{"rendered":"

Le Cloud computing<\/em> n’est plus simplement un effet de mode, c’est un sujet de fond qui vient bousculer notre utilisation des ressources informatiques. Techniquement, rien de r\u00e9volutionnaire, la plupart des couches n\u00e9cessaires \u00e0 sa mise en place s’appuient sur des outils matures (virtualisation, orchestration…). En revanche, adopter le Cloud<\/em> implique pour la DSI un changement de posture, plus ou moins profond selon son degr\u00e9 de maturit\u00e9.<\/p>\n

Le Cloud<\/em> impose-t-il une \u00e9volution forc\u00e9e ?<\/h2>\n

Le Cloud<\/em> simplifie l\u2019acc\u00e8s \u00e0 l\u2019outil informatique en focalisant l\u2019\u00e9nergie de l\u2019utilisateur sur le choix du service plut\u00f4t que sur la d\u00e9marche de mise en \u0153uvre. Cette facilit\u00e9 d\u2019acc\u00e8s \u00e0 des services \u00ab cl\u00e9 en main \u00bb peut inciter les M\u00e9tiers de l\u2019entreprise \u00e0 traiter directement avec les offreurs Cloud<\/em> sans impliquer la DSI. Pour contr\u00f4ler l’adoption des services Cloud<\/em>, la DSI doit devenir un acteur incontournable de ses M\u00e9tiers : non pas en s\u2019imposant mais bien devenant un partenaire l\u00e9gitime du M\u00e9tier, apporteur de valeur ajout\u00e9e aux services Cloud<\/em>.<\/p>\n

Une priorisation des chantiers n\u00e9cessaire<\/h2>\n

Le Cloud<\/em> n\u2019est pas qu\u2019un outil technique \u00e0 destination de la DSI seule. Il est essentiel de mettre en place sa strat\u00e9gie Cloud<\/em> en impliquant la Direction de l\u2019entreprise pour prendre en compte l\u2019existant et les besoins \u00e0 venir, en d\u00e9duire le p\u00e9rim\u00e8tre \u00e9ligible et enfin choisir ses mod\u00e8les de sourcing (Public et\/ou priv\u00e9) et le type de Cloud<\/em> (IAAS, PAAS et\/ou SAAS) adapt\u00e9 aux cas d\u2019usage. Deuxi\u00e8me \u00e9tape pour la DSI : promouvoir cette strat\u00e9gie aupr\u00e8s des M\u00e9tiers avec ses sponsors en valorisant les apports de la d\u00e9marche et en \u00e9clairant les contraintes li\u00e9es \u00e0 son utilisation.<\/p>\n

A ce stade la DSI devra choisir entre 2 positionnements :<\/p>\n

1) Un acc\u00e8s direct des m\u00e9tiers aux fournisseurs Cloud<\/em><\/h4>\n

La DSI ne porte pas la responsabilit\u00e9 du choix des fournisseurs mais apporte son expertise sur les dimensions :
\n\u2022\u00a0\u00a0 \u00a0Contractuelles<\/strong>, en mettant \u00e0 profit l\u2019exp\u00e9rience de la DSI pour d\u00e9finir les engagements en mati\u00e8re de niveau de service, de tra\u00e7abilit\u00e9, de pilotage des co\u00fbts\u2026
\n\u2022\u00a0\u00a0 \u00a0Techniques<\/strong>, en accompagnant les projets sur l\u2019int\u00e9gration des services Cloud<\/em> dans le SI de l\u2019entreprise tout en respectant les contraintes internes de s\u00e9curit\u00e9 et d\u2019\u00e9changes de donn\u00e9es
\n\u2022\u00a0\u00a0 \u00a0L\u00e9gales<\/strong>, en apportant sa connaissance des contraintes li\u00e9es \u00e0 l\u2019h\u00e9bergement des donn\u00e9es (donn\u00e9es personnelles, donn\u00e9es sensibles d\u2019entreprise, l\u00e9gislation fran\u00e7aise, contraintes sectorielles\u2026)
\n\u2022\u00a0\u00a0 \u00a0De r\u00e9versibilit\u00e9 technique et op\u00e9rationnelle<\/strong>, pour pr\u00e9parer en amont le d\u00e9sengagement d\u2019un fournisseur.<\/p>\n

2) Une DSI \u00ab broker de Cloud<\/em> \u00bb<\/h4>\n

La DSI se positionne comme l\u2019interlocuteur unique \u00e0 la fois du M\u00e9tier et des fournisseurs Cloud<\/em>.\u00a0 Le r\u00f4le d\u2019expertise reste d\u2019actualit\u00e9 et voit son p\u00e9rim\u00e8tre \u00e9tendu par une fonction de gestion des\u00a0 relations clients et fournisseurs. La DSI est alors en responsabilit\u00e9 :
\n\u2022\u00a0\u00a0 \u00a0D\u2019int\u00e9grer des services Cloud<\/em> technique ou m\u00e9tier au catalogue de la DSI
\n\u2022\u00a0\u00a0 \u00a0De piloter et de garantir la qualit\u00e9 des services expos\u00e9s par la DSI
\n\u2022\u00a0\u00a0 \u00a0De d\u00e9finir et de mettre en place les outils permettant une int\u00e9gration au SI des services Cloud<\/em> (IAM, \u00e9changes, service management\u2026)
\n\u2022\u00a0\u00a0 \u00a0De faire \u00e9voluer ses processus internes pour fournir un service utilisateur unifi\u00e9 ind\u00e9pendamment des modes de sourcing
\n\u2022\u00a0\u00a0 \u00a0Et bien s\u00fbr, de fournir ces services Cloud<\/em> au meilleur co\u00fbt du march\u00e9 \u00e0 ses utilisateurs !<\/p>\n

Bien que la strat\u00e9gie de positionnement soit \u00e0 d\u00e9finir suivant le contexte particulier de chaque entreprise, une majorit\u00e9 aura int\u00e9r\u00eat \u00e0 adopter un positionnement \u00ab broker de Cloud<\/em> \u00bb. Ce positionnement permettra de d\u00e9finir une strat\u00e9gie IT globale coh\u00e9rente entre les besoins internes et les possibilit\u00e9s offertes par les fournisseurs. Elle permettra ainsi de tirer toute la valeur \u00e9conomique et qualitative d\u2019une approche Cloud<\/em> par le biais d\u2019achats massifi\u00e9s et int\u00e9grables de mani\u00e8re standardis\u00e9e au SI.<\/p>\n

Les \u00ab temps m\u00e9tiers \u00bb et les \u00ab temps IT traditionnels\u00bb n\u2019ont plus la m\u00eame \u00e9chelle, le Cloud<\/em> est un des vecteurs de transformation qui permet de contribuer \u00e0 la performance globale de l\u2019entreprise. N\u00e9anmoins, pour combler ce d\u00e9calage, la DSI doit \u00eatre en perp\u00e9tuelle transformation pour fournir les moyens n\u00e9cessaires aux ambitions de l\u2019entreprise.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le Cloud computing n’est plus simplement un effet de mode, c’est un sujet de fond qui vient bousculer notre utilisation des ressources informatiques. Techniquement, rien de r\u00e9volutionnaire, la plupart des couches n\u00e9cessaires \u00e0 sa mise en place s’appuient sur des…<\/p>\n","protected":false},"author":300,"featured_media":3848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[35],"tags":[1213,44,257,1207,1210,89,1209,90,1214,1208,1211,73,346,100,142],"coauthors":[2545],"class_list":["post-3897","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-strategie-projets-it","tag-catalogue-de-la-dsi","tag-cloud-computing","tag-conduite-du-changement","tag-contrat","tag-hebergement-des-donnees","tag-iaas","tag-integration","tag-paas","tag-performance-de-lentreprise","tag-pilotage-de-couts","tag-reversibilite","tag-saas","tag-service","tag-sourcing","tag-transformation"],"acf":[],"yoast_head":"\nLe Cloud : une (r)\u00e9volution pour la DSI ?<\/title>\n<meta name=\"description\" content=\"Le Cloud computing n'est plus simplement un effet de mode, c'est un sujet de fond qui vient bousculer notre utilisation des ressources informatiques. 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