This International Standard is one of the SQuaRE series of International Standards, which contains general requirements for specification and evaluation of software quality and clarifies the associated general concepts. SQuaRE provides a framework for evaluating the quality of software products and states the requirements for methods of software product measurement and evaluation.This International Standard uses a methodology involving two types of evaluation for recoverability. One part of the method makes use of the disturbance injection methodology and a list of disturbances based on common categories of operational faults and events to evaluate the qual