Case-Based Reasoning Applied to Planning
Ralph Bergmann, Héctor Muñoz‐Avila, Manuela Veloso, Erica Melis⋆ · 1999
ion 15 1.7 PARIS: Flexible Reuse of Cases at Different Levels of Abstraction Traditionally, case-based reasoning approaches retrieve, reuse, and retain cases given in a single, concrete representation. Paris 2 (Bergmann 1996; Bergmann and Wilke 1995a) is a domain independent case-based planning system that differs from this traditional approach in that it introduces abstraction techniques into the case-based reasoning process. Paris retrieves, reuses and retains cases at different (higher) levels of abstraction. In a nutshell, Paris works as follows. Available planning cases given at the concrete level are abstracted to several levels of abstraction which leads to a set of abstract cases that are stored in the case-base. Case abstraction is done automatically in the retain phase of the CBR-cycle. When a new problem must be solved, an abstract case is retrieved whose abstract problem description matches the current problem at an abstract level. In the subsequent reuse phase, the abst...