This book presents recent advances in performability analysis methods and their applications in different fields. It covers various aspects of performability such as quality, reliability, maintainability, availability, safety, security, and sustainability that are essential in complex engineering systems such as electrical grids, chemical plants, naval defense systems, structures, nuclear reactors, railways, etc. This book is a collection of research works contributed by the former students of Professor KB Mishra who is a renowned researcher in reliability engineering. This book is useful for the researchers and professionals working in the area of performability engineering.