Opportunistic multimodel-based diagnosis: Framing all the knowledge we have to diagnose complex artifacts

Presents OMISSYS (Opportunistic Multimodel-based diagnosIS SYStem), an approach to diagnosis where all the available knowledge is framed into different types of models, belonging to a space defined by: level of abstraction, uncertainty, and epistemological type. All the knowledge is represented using possibly qualitative relationships among variables and possibly approximated values. OMISSYS uses the so-framed incomplete, uncertain, and approximate knowledge to diagnose a complex artifact, such as an industrial plant. It navigates opportunistically through an arbitrary set of models to reach a predefined diagnosis goal