Integrated Approach for Job Scheduling and Multi-Component Maintenance Planning ina Production System

Shop floor level operations planning significantly affect the production system performance. Traditionally, in a production system, maintenance planning and production scheduling have been considered and optimized independently. However, these two aspects of operations planning do have an interaction effect on each other and hence need to be considered jointly for improving the system performance. Current paper proposes joint optimization of job scheduling and maintenance planning for a multi component machine in a production system. Multiple jobs having different processing time and delivery dates are considered for scheduling.Minimization of total cost of maintenance and production is used as the objective function for the joint optimization problem. Approach is illustrated with the help of an example. Simulation based genetic algorithm optimization technique has been used to find the optimal solution. The result is compared with the Earliest Due Date (EDD) sequencing results. It is concluded that the joint consideration of maintenance and production sequencing results into better system performance. Keyword:Integrated planning, Job scheduling, Maintenance planning, Simulation