[eng] IT service provider organizations that have implemented a QualityManagement System(QMS) according to ISO 9001 can take advantage of all the effortsmade when implementing an IT ServiceManagement System(ITSMS). In order to facilitate the integration of these two management systems, we analyze the existing relations between the requirements of the QMS and the ITSMS. Based on these results, we provide a new Integrated Management System (IMS) which widens the scope of the ISO 9001 QMS with the specific IT service management requirements of ISO/IEC 20000-1, and present a guide to support organizations in implementing this IMS.