Object-oriented modeling for the integrated process planning and production scheduling system
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This research explores an object-oriented generic model for integrated process planning and production scheduling. The research employs the most advanced objectoriented modeling technique and tools to implement a hierarchical-interactive process planning approach which integrates the process planning and production scheduling functions through a stepwise integration advancement. The integration of process planning and production scheduling is a comprehensive, controversial, and complicated topic to both academia and industry. Both process planning and production scheduling play important roles in manufacturing systems. Traditionally, these two functions are separated and have their own planning goals, constraints, and methodologies. The integration of these two functions has been driven by the fact that many process plans cannot be executed on the shop floor because the production constraints are not considered during the process planning. However, the implementation of the integrated planning remains an enigmatic task because of its complexity. While many studies have been conducted, more efforts are yet to be invoked. In this research, the integration of process planning and production scheduling is approached by a Hierarchical-Interactive Process Planning (HIPP) architecture, which has been modeled in the object-oriented paradigm. The HIPP includes three levels interactions between process planning and production functions. The functional and data gaps in the existing separated planning are bridged through object-oriented systems models.