A Comparison of Change Management Implementation in ITIL, CMMI and Project Management Kalinka Kaloyanova 1 , Emanuela Mitreva 1 , 1 Faculty of Mathematics and Informatics, Sofia University, 5 James Bourchier blvd., 1164, Sofia, Bulgaria kkaloyanova@fmi.uni-sofia.bg, emitreva@gmail.com Abstract. The paper focuses on the Change Management process. The scope of the process, its main goals, roles, politics and procedures are discussed. Three methodologies that apply Change Management are compared – ITIL (Information technology Infrastructure Library), CMMI (Capability Maturity Model Integration) and PM (Project Management). A method is presented that enables to compare the implementing of the process into different methodologies. The paper contributes to the understanding of the adoption of Change Management in various IT areas. Keywords: ITIL, CMMI, Project Management, Change Management 1. Introduction All areas of today’s business world change very rapidly. This is not only requires the organizations to manage the effectively and efficiently delivery of the changes but also is a key factor for them in order to be competitive. The ability to react to change requests and to control the change process is an important part of the work of every IT department. The Change Management is an organizational process that supports changes accepting in the business environment. Change Management helps organizations to understand and to work for minimizing risks of changes to the IT environment. The main focus of the Change Management process is to manage and control the changes and to formalize the call flow, the procedures of change and the ways to measure the success of the application of a change. Formal procedures and activities make the risks more predictable and clear. This is the key goal for the Change Management process - to ensure that all concerned parties' requirements for quality, functionality and effectiveness are met. The Change Management concerns different IT aspects from software products and services development and maintenance [9], [6] to controlling changes in the complex IT environment [12], [13]. All organizations would have well-documented Change Management practices, strong procedures how to follow them and tools that support the process [11]. In this paper the changes and their aspects are discussed in different frameworks