Diagnosis and testing: How is their relation? Can they be combined?

Abstract

Diagnosis and testing have coexisted for a long time, even though they have not been combined, mostly because they consider errors in a different manner. In this paper we present a novel framework that combines fault diagnosis with ioco-passive testing. To do so in a proper manner we initially present a formal definition of testability for transition system models, as well as for model-based testing. Later, we enrich our framework so that it captures possible attacks from malicious users. Finally, we consider a weighted failure model that can inform about the severity of a failure. We conclude that diagnosis and testing can be combined in a profitable manner.