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Case models

Here the case model represents the states that the problem solver will go through while working on the problem.

• In C&D the intermediate case models (states) represent explanations that cover the initial symptoms. The explanations have different degrees of confirmation by the available symptoms (i.e. their required or enabling symptoms have not been requested or are not available) and have different depths of explanatory connections.

• The initial case model (start state) represents the explanation that covers the the initial symptoms.

• The solution case model (end state) represents an explanation that fulfils the initial requirements and intermediate constraints, and has no explanatory connections.

• The case user input data is a set of symptoms necessary to differentiate the covering explanations.