Optimizing performance and dependability of computer systems

Abstract

Upon the completion of this thesis, I express my sincere thanks to my supervisor, Assistant Professor Agapios N. Platis for his guidance, continuous encouragement and support during the years of my studies. His ideas and his knowledge in the area of Reliability was an inspiration for my work and his advice helped me to overcome a lot of difficulties.I would also like to thank Associate Professor George A. Gravvanis for his support during the thesis, his important advice and for providing me with his software which has been a very important tool for critical issues that came up through my work. I also thank Associate Professor E.