The book is about to explore the new aspects of Portfolio Cost Management (PCM) in the context of Offshore Software Development Outsourcing (OSDO), from the vendor's perspective. Before getting into the thick of the things, we discuss the documented facts about the software industry. It is documented that the globalization process has affected the software industry in the form of OSDO. Proper project management is a prominent factor in the success of OSDO relationships. Efficient project cost management is a key challenge for the software industry for the last few decades. In this regards, PCM is the finest approach for the cost effective management of the outsourced projects. For a long time, quality of research has been carried out on optimization of project costs. However, none of the researcher used systematic approach for the fruitful outcomes of PCM in the context of OSDO relationships. We have performed a systematic literature review by successfully incorporating all its steps phases and procedures. Our research reveals 16 success factors that positively influence PCM phenomenon.