Integrating Process Planning and Scheduling Taking into Account Multiple Objective Using Constraint Planning

The purpose of this research was to apply various flexibilities including device, tools, direction toward accessing the device (TAD) flexibilities, and considering the qualitative parameters based on the fuzzy inference system for integrated optimization of process planning and scheduling using the Constraint Programmingapproach. There are many approaches to solving IPPS problems. In this research, because of the multitude of existing variables and the complexity of the solution space, limited planning has been used to solve the problem. At first, the qualitative parameters of the model are calculated based on the fuzzy inferencing system and after providing other inputs and solving the problem using limited planning, an optimal answer will be obtained. To evaluate the efficiency of the integrated model, an example in the literature considering three states of short, medium and long due date time, has been solved using IBM ILOG Cplex optimization studio software. The results indicated the proper functioning of the limited planning method to obtain optimal solutions in a limited time. In fact, the results of the numerical experiments showed that the proposed model has acceptable performance and the proposed algorithm can efficiently solve IPPS. Finally, we can conclude that it is a very suitable method for integrated optimization of multiple objectives.