The measure of a system's maintainability, availability, reliability and maintenance support performance is known as dependability. Some of its characteristics are safety, durability and security. Attributes, threats, and means are the major three elements of dependability. Attributes refer to the qualities of a system. Availability, reliability, safety, integrity and maintability are dependability attributes. The objects or phenomenon which affect a system and result in a drop in its dependability are termed as threats. Means are constructed in order to break the Fault-Error-Chains so as to increase the dependability of a system. The four different means are prevention, removal, forecasting and tolerance. This book unravels the recent studies in the field of dependability engineering. It explores all the important aspects of this discipline in the present day scenario. This book will provide comprehensive knowledge to the readers.