Haidar, HassanKolp, ManuelBuenaire Zambrano, TammyTammyBuenaire Zambrano2017Nowadays, the significance of information and the pervasiveness of information technology – IT are increasingly widespread within every aspect of business environment and of public life. They become key resources for the companies within the governance1 and management. So that the governance of enterprise IT – GEIT is currently considered as integral part of governance. GEIT mainly focuses on the benefit realization, risk optimization and resource optimization while establishing that the current IT functionality is aligned with business needs. ISACA has researched to provide a framework evaluating, directing, and monitoring the enterprise IT. Hence the emergence of COBIT, a framework helping enterprises to create optimal value from IT through a range of enablers prescribing processes, roles, responsibilities, and accountabilities. The last version is COBIT 5COBIT 5ISACAIT ManagementIT GovernanceIT Procurement ManagementIT RisksProjectsIT GoalsBusiness GoalsPrinciplesStakeholder DriverImplementationEnabling ProcessFrameworkGovernanceManagementISO:IEC 38 500IT ProcessIT ActivitiesMetricsIT SavvyGEITPhaseObjectivesGoalsStructureOrganizationITInformationCOBIT 5 Implementation COBIT 5 Case Study in Aetna Inc.text::thesis::master thesisthesis:11116