Research on process planning and scheduling integrated system oriented to e-manufacturing

To meet the new requirements of e-manufacturing for enterprise's production planning and scheduling, a system model was proposed to dynamically integrate process planning and production planning and scheduling. In the model, a fuzzy evaluation model was firstly introduced to make dynamic process planning decisions according to lead time of parts, utilization rate of machines and other manufacturing resources so as to obtain the most suitable process planning for the current production conditions. Then, manufacturing resources decisions were made according to their load coefficients and all process-grade tasks were assigned to appropriate machines. In order to resolve the problem of process-grade tasks scheduling for e-manufacturing cell, taking the parts' transfer time among machines into consideration, a new scheduling model based on ant colony algorithm was brought forward. To ensure availability of the scheduling result, dynamic scheduling strategies were finally provided according to the self-adaptive scheduling principles.