Stochastic Models for Fault Tolerance : Restart Rejuvenation and Checkpointing As modern society relies on the fault free operation of complex computing systems system fault tolerance has become an indispensable requirement. Therefore we need mechanisms that guarantee correct service in cases where system components fail be they software or hardware elements. Redundancy patterns are commonly used for either redundancy in space or redundancy in time. Wolters book details methods of redundancy in time that need to be issued at the right moment. In particular she addresses the so called timeout selection problem i.e. the question of choosing the right time for different fault tolerance mechanisms like restart rejuvenation and checkpointing. Restart indicates the pure system restart rejuvenation denotes the restart of the operating environment of a task and checkpointing includes saving the system state periodically and reinitializing the system at the most recent checkpoint upon failure of the system. Her presentation includes a brief introduction to the methods their detailed stochastic description and also aspects of their efficient implementation in real world systems. The book is targeted at researchers and graduate students in system dependability stochastic modeling and software reliability. Readers will find here an up to date overview of the key theoretical results making this the only comprehensive text on stochastic models for restart related problems.