{"id":111489,"date":"2026-07-15T17:52:27","date_gmt":"2026-07-15T17:52:27","guid":{"rendered":"https:\/\/mybusinessfuture.com\/?p=111489"},"modified":"2026-11-03T16:41:02","modified_gmt":"2026-11-03T16:41:02","slug":"deux-systemes-erp-apres-une-acquisition-que-faire","status":"publish","type":"post","link":"https:\/\/mybusinessfuture.com\/fr\/deux-systemes-erp-apres-une-acquisition-que-faire\/","title":{"rendered":"Deux ERP apr\u00e8s une acquisition : que faire ?"},"content":{"rendered":"<p style=\"display:inline-block;background:#c0392b;color:#fff;padding:4px 14px;border-radius:20px;font-size:0.85em;margin-bottom:18px;\">4 min de lecture<\/p>\n<p><strong>Apr\u00e8s une acquisition, la soci\u00e9t\u00e9 m\u00e8re et l\u2019entreprise rachet\u00e9e doivent poursuivre leur activit\u00e9 pendant que la direction d\u00e9cide du sort de leurs ERP. Les deux syst\u00e8mes peuvent dans un premier temps \u00eatre maintenus, reli\u00e9s par des interfaces ou r\u00e9unis sur une plateforme commune. Le choix d\u00e9pend des processus m\u00e9tier, des donn\u00e9es n\u00e9cessaires et du calendrier. Un \u00e9tat des lieux r\u00e9alis\u00e9 t\u00f4t permet d\u2019\u00e9viter d\u2019oublier des fonctionnalit\u00e9s importantes lors de l\u2019int\u00e9gration.<\/strong><\/p>\n<div style=\"background:#202528;color:#fff;padding:32px 36px;margin:32px 0;border-radius:8px;\">\n<p style=\"margin:0 0 18px 0;font-size:0.95em;font-weight:800;text-transform:uppercase;letter-spacing:0.2em;color:#e8828d;border-bottom:2px solid rgba(232,130,141,0.3);padding-bottom:12px;\">L\u2019essentiel en bref<\/p>\n<ul style=\"margin:0;padding-left:22px;color:rgba(255,255,255,0.92);line-height:1.6;\">\n<li style=\"margin-bottom:12px;\"><strong style=\"color:#e8828d;\">Trois options sont possibles.<\/strong> Le fonctionnement en parall\u00e8le maintient dans un premier temps les deux syst\u00e8mes. Une connexion permet d\u2019\u00e9changer certaines donn\u00e9es. Une migration transf\u00e8re les processus et les donn\u00e9es vers un syst\u00e8me cible.<\/li>\n<li style=\"margin-bottom:12px;\"><strong style=\"color:#e8828d;\">Les processus m\u00e9tier sont d\u00e9terminants.<\/strong> Avant de d\u00e9cider, il faut examiner les fonctionnalit\u00e9s sp\u00e9cifiques, les interfaces, la qualit\u00e9 des donn\u00e9es et les exigences li\u00e9es \u00e0 l\u2019\u00e9tablissement de comptes communs.<\/li>\n<li><strong style=\"color:#e8828d;\">Les responsabilit\u00e9s et les tests doivent \u00eatre d\u00e9finis t\u00f4t.<\/strong> Les \u00e9quipes m\u00e9tier et informatiques doivent pr\u00e9parer ensemble la correspondance des donn\u00e9es, le basculement et les processus essentiels.<\/li>\n<\/ul>\n<\/div>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">Trois options pour les syst\u00e8mes apr\u00e8s l\u2019acquisition<\/h2>\n<p><strong>Fonctionnement en parall\u00e8le :<\/strong> les deux entreprises continuent dans un premier temps \u00e0 utiliser leurs ERP existants. Cette solution laisse du temps pour dresser un \u00e9tat des lieux et peut aussi convenir \u00e0 plus long terme si les soci\u00e9t\u00e9s travaillent de mani\u00e8re largement autonome. Pour produire des analyses communes, il faut toutefois d\u00e9finir qui fournit quelles donn\u00e9es et comment les diff\u00e9rences sont rapproch\u00e9es. Les co\u00fbts de licence, d\u2019exploitation et de maintenance des deux syst\u00e8mes doivent entrer dans le calcul. Une date de r\u00e9examen convenue permet d\u2019\u00e9viter que la solution perdure sans \u00eatre \u00e9valu\u00e9e.<\/p>\n<p><strong>Connexion :<\/strong> les deux syst\u00e8mes sont maintenus et \u00e9changent certaines donn\u00e9es par des interfaces. Cette option peut \u00eatre pertinente si la filiale doit conserver ses propres processus alors que le groupe a r\u00e9guli\u00e8rement besoin d\u2019informations communes. Il faut d\u00e9finir en amont quel syst\u00e8me fait r\u00e9f\u00e9rence pour chaque jeu de donn\u00e9es, comment les modifications sont transmises et qui traite les erreurs. Une interface peut aussi servir de solution transitoire en attendant la pr\u00e9paration d\u2019une migration.<\/p>\n<p><strong>Migration :<\/strong> l\u2019entreprise rachet\u00e9e passe \u00e0 un syst\u00e8me cible commun. Cette option peut convenir si ses besoins peuvent y \u00eatre pris en charge et si l\u2019exploitation commune justifie les efforts n\u00e9cessaires. Avant de d\u00e9cider, les \u00e9quipes m\u00e9tier doivent examiner les fonctionnalit\u00e9s, les donn\u00e9es historiques et les op\u00e9rations en cours \u00e0 reprendre. Les adaptations du syst\u00e8me cible et les co\u00fbts du basculement doivent \u00e9galement entrer dans la comparaison.<\/p>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">Quatre questions avant de d\u00e9cider<\/h2>\n<p>La direction devrait \u00e9laborer les r\u00e9ponses avec les responsables des deux entreprises :<\/p>\n<ol>\n<li>Quel degr\u00e9 d\u2019autonomie la soci\u00e9t\u00e9 acquise devra-t-elle conserver \u00e0 l\u2019avenir ?<\/li>\n<li>Quels processus et quelles fonctionnalit\u00e9s sp\u00e9cifiques sont importants pour fournir ses prestations ?<\/li>\n<li>De quelles donn\u00e9es le groupe a-t-il besoin pour le pilotage et l\u2019\u00e9tablissement des comptes et \u00e0 quelle \u00e9ch\u00e9ance ?<\/li>\n<li>Quels sont les co\u00fbts ponctuels et r\u00e9currents li\u00e9s \u00e0 l\u2019exploitation, aux interfaces et \u00e0 une \u00e9ventuelle migration ?<\/li>\n<\/ol>\n<p>L\u2019\u00e9tat des lieux porte aussi sur les contrats et leurs dur\u00e9es, les interfaces existantes, les responsabilit\u00e9s et l\u2019\u00e9tat des donn\u00e9es de r\u00e9f\u00e9rence. Si cet examen est possible avant l\u2019achat, il peut \u00eatre int\u00e9gr\u00e9 \u00e0 la due diligence. Apr\u00e8s l\u2019achat, il sert de base \u00e0 un plan d\u2019int\u00e9gration solide.<\/p>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">D\u00e9finir des r\u00e8gles claires pour les donn\u00e9es de r\u00e9f\u00e9rence et les interfaces<\/h2>\n<p>Les clients, les fournisseurs et les articles peuvent \u00eatre d\u00e9sign\u00e9s diff\u00e9remment ou enregistr\u00e9s plusieurs fois dans les deux syst\u00e8mes. Pour chaque type de donn\u00e9es partag\u00e9, un accord est donc n\u00e9cessaire : o\u00f9 sont-elles tenues \u00e0 jour, qui peut les modifier et comment les \u00e9carts sont-ils r\u00e9solus ? En cas de connexion, il faut \u00e9galement d\u00e9finir quelles donn\u00e9es sont transmises, dans quel sens et \u00e0 quelle fr\u00e9quence.<\/p>\n<p>Lors d\u2019une migration, les commandes en cours, les stocks et les soldes s\u2019ajoutent \u00e0 ces \u00e9l\u00e9ments. Dans sa <a href=\"https:\/\/learn.microsoft.com\/en-us\/dynamics365\/guidance\/implementation-guide\/data-management-configuration-data-migration\">documentation sur la migration des donn\u00e9es<\/a>, Microsoft cite parmi les t\u00e2ches la mise en correspondance des champs, le contr\u00f4le de la qualit\u00e9 des donn\u00e9es et la d\u00e9finition des responsabilit\u00e9s. Ces indications concernent Dynamics 365, mais les questions qu\u2019elles soul\u00e8vent sont aussi utiles pour comparer d\u2019autres projets ERP.<\/p>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">Pr\u00e9parer le basculement avec les \u00e9quipes m\u00e9tier<\/h2>\n<p>Les personnes charg\u00e9es des ventes, des achats, de la production et de la comptabilit\u00e9 connaissent les processus que le syst\u00e8me doit prendre en charge. Leur examen permet par exemple de v\u00e9rifier si une commande peut \u00eatre trait\u00e9e de sa r\u00e9ception jusqu\u2019\u00e0 la facturation dans le processus cible choisi. L\u2019\u00e9quipe informatique apporte son \u00e9clairage sur les interfaces, les droits d\u2019acc\u00e8s et l\u2019exploitation. Dans sa <a href=\"https:\/\/learn.microsoft.com\/en-us\/dynamics365\/guidance\/implementation-guide\/implementation-strategy\">strat\u00e9gie de mise en \u0153uvre<\/a>, Microsoft mentionne la participation des responsables de processus ainsi que les tests et les formations.<\/p>\n<p>Avant un changement de syst\u00e8me, la reprise des donn\u00e9es et les processus critiques devraient \u00eatre test\u00e9s avec des donn\u00e9es repr\u00e9sentatives. Un plan de basculement d\u00e9finit qui d\u00e9cide et \u00e0 quel moment, combien de temps les syst\u00e8mes peuvent \u00eatre arr\u00eat\u00e9s pour la reprise et comment proc\u00e9der en cas de probl\u00e8mes graves. Les responsables m\u00e9tier valident les r\u00e9sultats avant la mise en service. Une nouvelle interface n\u00e9cessite elle aussi des tests et des r\u00e8gles pour le support courant.<\/p>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">Questions fr\u00e9quentes<\/h2>\n<details>\n<summary><strong>L\u2019entreprise acquise doit-elle adopter l\u2019ERP de l\u2019acheteur ?<\/strong><\/summary>\n<p>Non. Le fonctionnement en parall\u00e8le et la connexion sont d\u2019autres possibilit\u00e9s. Le choix d\u00e9pend des besoins des soci\u00e9t\u00e9s et des efforts associ\u00e9s \u00e0 chaque solution.<\/p>\n<\/details>\n<details>\n<summary><strong>Quels co\u00fbts faut-il comparer ?<\/strong><\/summary>\n<p>Outre les licences et l\u2019exploitation, il faut notamment prendre en compte la maintenance des donn\u00e9es, les interfaces, le support, les formations et le basculement ponctuel. Le montant d\u00e9pend des syst\u00e8mes existants et de l\u2019approche retenue.<\/p>\n<\/details>\n<details>\n<summary><strong>Quand commencer l\u2019examen des ERP ?<\/strong><\/summary>\n<p>D\u00e8s la due diligence, si l\u2019acc\u00e8s aux informations n\u00e9cessaires est possible. Au plus tard apr\u00e8s l\u2019achat, les responsables devraient dresser ensemble un \u00e9tat des lieux des processus, des syst\u00e8mes et des donn\u00e9es.<\/p>\n<\/details>\n<h2 style=\"padding-top:64px;margin-bottom:20px;\">\u00c0 lire aussi<\/h2>\n<div style=\"margin:0 0 24px 0;padding:0;\">\n<ul style=\"list-style:none;margin:0;padding:0;\">\n<li style=\"padding:10px 0;border-bottom:1px solid #eee;\"><a href=\"https:\/\/mybusinessfuture.com\/fr\/migration-vers-s-4hana-les-entreprises-de-taille-moyenne-face-a-une-decision-en\/\" style=\"color:#1a1a1a;text-decoration:none;\">Le pi\u00e8ge de la maintenance des ERP dans les PME<\/a><\/li>\n<li style=\"padding:10px 0;border-bottom:1px solid #eee;\"><a href=\"https:\/\/mybusinessfuture.com\/fr\/optimisation-des-processus-lechec-se-situe-dans-la-transmission-non-dans-loutil\/\" style=\"color:#1a1a1a;text-decoration:none;\">L\u2019optimisation des processus \u00e9choue au passage de relais, pas \u00e0 cause de l\u2019outil<\/a><\/li>\n<li style=\"padding:10px 0;\"><a href=\"https:\/\/mybusinessfuture.com\/fr\/heritage-sans-successeur-comment-gerer-la-transmission-dune-oeuvre-de-vie\/\" style=\"color:#1a1a1a;text-decoration:none;\">Quand l\u2019\u0153uvre d\u2019une vie ne trouve pas de repreneur<\/a><\/li>\n<\/ul>\n<\/div>\n<div style=\"margin:40px 0 24px 0;\">\n<p style=\"margin:0 0 12px 0;font-size:0.78em;font-weight:700;text-transform:uppercase;letter-spacing:0.18em;color:#666;\">\u00c0 d\u00e9couvrir dans le r\u00e9seau MBF Media<\/p>\n<div style=\"padding:14px 18px;background:#fafafa;margin-bottom:6px;\">\n<div style=\"font-size:0.7em;font-weight:700;color:#d65663;text-transform:uppercase;letter-spacing:0.12em;margin-bottom:4px;\">digital-chiefs<\/div>\n<p><a href=\"https:\/\/www.digital-chiefs.de\/fr\/vmware-sous-broadcom-le-plan-de-sortie-comme-levier\/\" style=\"font-weight:600;line-height:1.4;color:#1a1a1a;text-decoration:none;\">VMware sous Broadcom : le plan de sortie comme levier<\/a><\/p>\n<\/div>\n<\/div>\n<p style=\"text-align:right;\"><em>Source de l\u2019image : g\u00e9n\u00e9r\u00e9e par IA (juin 2026)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s une acquisition, deux ERP coexistent. Processus, donn\u00e9es, co\u00fbts et exigences li\u00e9es aux comptes communs orientent le choix.<\/p>\n","protected":false},"author":195,"featured_media":110083,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Int\u00e9gration ERP","_yoast_wpseo_title":"Deux ERP apr\u00e8s une acquisition : que faire ?","_yoast_wpseo_metadesc":"Deux ERP apr\u00e8s une acquisition : quand choisir l\u2019exploitation parall\u00e8le, l\u2019int\u00e9gration ou la migration et quelles questions poser 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