This is a book of a Ph.D. dissertation in the field of Computer Education and Instructional Technologies. Purpose of the study in the book is to investigate the phases of change process of integrating a quality development model into an information technology company in Turkiye (Turkey). While the transformation phases were being examined by a qualitative study, the factors that affect the change process also were investigated. This book tells the process of traveling through the way to CMMI (Capability Maturity Model Integration) level 3 certification by a company that gives information technologies service to banking sector. Since circulation of staff prevents us from obtaining what an exact number of workers, the company has about 450 employees. At the beginning, the company had no quality standards and most of the work processes were not documented, even documented processes were not consistent. After the commencement of the quality development project, work flows of processes were defined and documented. The company changed its organization according to the new process improvement model, called CMMI.