This section outlined a number of successful examples for process planning, including machining, assembly, embossing, forming, and electrical assembly. Some problems were indicated in terms of design representation, sequencing, planning approach, cost optimization, and the need for geometrical modeling.
The various machined parts were planned successfully, and indicated that the planner would work well for a single process domain. The addition of multiple process domains increased the challenge to the planner. This example clearly showed the shortcoming of the method by suggesting that a drilling operation be used for a hole that is only half embedded in the workpart (and would cause drill bit deflection). In addition, this example demonstrated the planners ability to deal with complex shapes (the spring). The planner was also capable of recognizing the symmetry of two parts, and it produced them in batches of two, instead of as two separate parts. Finally the process plan included a printing operation, that would effectively have no geometrical significance, but be of great importance to the value of the final product.
The digital circuit example illustrated that the planner was also capable of doing innovative planning problems. But, the plan for the selection and assembly of the circuit was reversed in order. This in itself is not significant, but it does indicate that the planner requires more study.