Differences in results of measurement between ITIL 2007 and ITIL 2011 model for the IMS system
— The aim of this paper is to present differences between ITIL model from 2007 and ITIL model from 2011. IP Multimedia Subsystem is chosen as the test architecture for the implementation of these two models. The paper contains two different measurements. In the first measurement are taken only 2 parameters: time period needed for the implementation and the number of employees needed for the implementation. Results have showed that the model from 2011 is better for 12% than the model from 2007. In the second measurement are taken all Key Performance Indicators for 15 ITIL processes: Financial Management, Service Portfolio Management, Service Level Management, Capacity Management, Availability Management, IT Service Continuity Management, Information Security Management, Supplier Management, Change Management, Service Asset and Configuration Management, Release and Deployment Management, Service Validation and Testing, Incident Management, Problem Management and Continual Service Improvement process. Results in this measurement have showed that the model from 2011 is better for 10% than the model from 2007.