Abstract: Based on analysis of independent decision models for production scheduling and preventive maintenance planning, an integrated model is proposed that simultaneously determines production scheduling and preventive maintenance planning decisions so that the total weighted tardiness of jobs is minimized. In the model, according to the failure distribution function of the machine, the estimative failure time and renewal time of the machine are joined in decision variables set. Finally, a simple example is used to demonstrate the contrastive analysis results by independent decision and integrating optimal scheduling. The numerical results show an average reduction of 30% in expected total weighted tardiness.

Key words: Industrial engineering, Preventive maintenance planning, Production scheduling