Finding the reason of failure is significant in engineering, and it is like the diagnostic treatment. However, the failure phenomenon of the engineering item is analyzed by physics. The ability of physics is a fundamental tool for a reliability engineer.
Moreover, the reason has to reflect to the prevention in design of new items. The reliability design is significant, and the reliability engineer makes effort to get the designing method.
Of course, the management based on technology and business is the foundation for the high quality engineering activities.
