Case-Based Process Planning

Michael M. Marefat and John M. Britanik

Department of Electrical and Computer Engineering
University of Arizona
Tucson, Arizona 85721

Email: { marefat,britanik}


This research focuses on developing a case-based process planner which combines the advantages of the variant and generative approaches to process planning. The case-based process planner operates on general 3D prismatic parts, represented by a collection of features (eg: slots, pockets, holes, etc.). Each feature subplan is developed and then merged into the global process plan in the appropriate sequence. Abstracted feature subplans correspond to cases, which are used in subsequent planning operations to solve new planning problems. The abstracting and storing of feature subplans as cases is the primary mechanism by which the planner learns from its previous experiences to become more effective and efficient. The computer-aided process planner is designed to be extensible and flexible through the effective use of object-oriented principles.