Multi-objective optimization research on preventive maintenance planning and production scheduling

In order to reduce the effects of machine failures on the manufacturing cost and time,a multi-objective optimization model was proposed to jointly determine preventive maintenance planning and production scheduling for a single machine.The maintenance cost,makespan,total weighted completion times,and total weighted tardiness were simultaneously considered as objectives.Multi-objective genetic algorithms were developed to solve a joint optimization model for PM planning and production scheduling.Compared with the method of optimization integrating PM planning and production scheduling and the methods separately optimizing PM planning and production scheduling in an example,the proposed multi-objective joint optimization method can save more time at a lower cost.