Knowledge-Based Systems

320 Chapter 11 Knowledge-IntensIve learnIng: dIet Menu planner

matching case. In this context, “ significantly different” means that the two

sets have different values and the corresponding findings cannot be gener-

alized. If both cases have the same findings and their values are close enough

to be generalized, the two cases are merged. If their values are close enough

to be regarded equal, the only update made is adding “book-keeping” in-

formation to the case and adjusting the relevance factors. If a past case leads

to a successful solution to the new problem, this leads to a strengthening of

the relevance factor for each finding. If a past case leads to an unsuccessful

solution, this leads to a weakening of the relevance factors.

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