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.

Wolter's 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...