ON THE INTEGRATION OF A PRODUCTIVITY MODEL INTO AN OPTIMAL PREVENTIVE MAINTENANCE SCHEDULING MODEL

Maintenance productivity measures how efficiently and effectively resources are utilized, while maintenance scheduling is concerned with an orderly arrangement of jobs for maintenance with the aim of restoring facilities for use within the shortest possible time and at the minimum cost. Since both maintenance productivity and maintenance scheduling aim at achieving important maintenance organizational goals, integrating modules from either side would permit measurement of scheduling performance with resource optimization. This paper integrates a productivity model with a maintenance scheduling model in a holistic manner that lakes advantage of the good attributes of each of the models. A binary Gantt charting model for a multi-facility multi-period framework with schedules carried out in contiguous periods is used. The objective is to minimize the total preventive maintenance cost. The productivity model utilized is expressed as output to input ratio. The results obtained reflect the flexibility of integrating these two models. Managers and decision-makers can use the information to decide on the effective utilization of resources. The paper seems to be the first documentation on the issue of integration between productivity and scheduling in a maintenance organization