Now-a-days engineers and managers of the industries are interested in the estimation of the MTSF (mean-time-to-system-failure) , reliability , busy period of the repairman on one side and the manufacturing time per equipment , up , down and idle time of the system on the other. They'd like to increase the reliability of the equipment's and systems and to decrease the processing time of the equipment's as best as possible. Flexibility , reliability and productivity along with cost , quantity and service.In the competitive world of manufacturing there is a great pressure on the manufacturers to modify their products quite frequently. For achieving these goals there should be a feasible production system. To get feasible production system , there is an urgent need of knowing all the parameters which are responsible for the production of an equipment of high quality or less cost. By maintaining the system , not only the reliability but also the related profit may be increased.So this book is very helpful for all those who wants to achieve the above things. Also this book is very helpful for those who wants to work in the area of reliability.