This book is primarily concerned with reliability analysis and Life cycle costing of CNC Machine. Reliability and life cycle cost analysis of a CNC machine deals with many opportunities both for the manufacturers and the customers. The analysis permits to understand the behavior of the machine and to obtain useful information in order to form maintenance policies based on the analytical results. Firstly, the FTA method is discussed and possible failure modes are found by constructing fault tree of CNC machine. The qualitative as well as quantitative evaluations of CNC machine are presented. The components wise as well as subsystem wise reliabilities have been estimated. Further, maintainability and availability measurers are estimated. The total life cycle cost of CNC machine is also estimated with the help of appropriate life cycle cost model. The detailed life cycle cost analysis provides useful information for decision making in purchasing a product, in minimizing LCC and identifying the critical components. Based on detailed LCC, reliability improvement measures are also suggested from which improved reliability as well as improved life cycle cost is also estimated.