Date of Award


Document Type


Degree Name

Doctor of Philosophy (PhD)

First Advisor

James M. Pruett


The objective of this research is to evaluate present maintenance scheduling systems and to suggest improvements or alternatives. The widely used priority-based maintenance scheduling system is shown to be inappropriate in a variety of scheduling circumstances. The major reason is the omission of any type of cost consideration. To overcome this shortcoming, a new maintenance scheduling model is proposed. Instead of using work-order priority as the primary scheduling criteria, the new system uses cost as the key scheduling component. That is, maintenance jobs are scheduled with the objective of minimizing total maintenance cost. Maintenance scheduling strategies based on the cost model are then developed for several different circumstances (e.g., only emergency work-orders). Finally, the cost-based scheduling strategies are tested and found to be more effective in terms of cost reduction than the more commonly used maintenance scheduling approaches.