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Today, software is found in almost all systems, vehicles, communication devices, medical equipments, and entertainment, for example. The size and complexity of these systems has grown continuously over the last forty years ? the time span for modern computing. The latest release of the Windows operating system, called Vista, is more than fifty million lines of code, about 40% bigger than the previous version. Some of the reasons for this are numerous feature demands and the need to support multiple platforms, and need for compatibility with legacy software and hardware. Each line of code, in these large systems, requires perhaps several technical decisions, often, but not always simple. The sheer volume of this decision making process is daunting. No single human can fully understand a system of high complexity. To help ameliorate this problem, systems are decomposed into subsystems, libraries, modules, and classes. Most of these components have interdependencies, in order to provide services, one to another. However, in systems of great size, the dependencies often become a dense web of relationships. It is exactly this problem on which we focus in this book.
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Dr. Gungor is a Senior Researcher at The Scientific and Technological Research Council of Turkey in Ankara. He completed his Ph.D.(June 2006) and M.S. (May 2001) in Computer and Information Science Syracuse University Syracuse, New York. B.S. in (July 1997) Industrial Engineering, Sakarya University, Turkey.
