This paper presents and analyses the findings of a multi-case study on ten companies that have recently finished the implementation of the ITIL(Information Technology Infrastructure Library) methodology and provided us a full overview of the entire process, together with feedback on how the business has changed after the ITIL implementation. The study was designed to collect data related to how ITIL was implemented within the organizations, but also how the preimplementation and

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... ion periods look like. All this information is collected in a structured way with the purpose to find a common approach of the companies that may fit the best for this kind of organizational change. One of the main questions for this paper is: is there any change management model applied for the ITIL implementation process within a company? This study will partially help us find an answer. The main research method involved questionnaires in the organizational environment and the persons involved in this research were part of the ITIL implementation processes. The questions addressed are also presented in this paper, together with diagrams and a structured view of all answers received. At the end of this paper are presented some conclusions.