Preventive Maintenance Scheduling Optimization

The utility industry is faced with the challenge of providing reliable treatment, distribution, and collection of water/wastewater services to a large infrastructure of customers, while being good environmental stewards. Thousands of assets comprise the treatment, distribution, and collection system across multiple facilities. Standard equipment operation is critical to providing customers with high quality water/wastewater services that meet regulatory requirements. To ensure proper operation of critical equipment, a PM strategy is utilized at KUB. Multiple resources are utilized when executing preventive maintenance, such as labor, materials, and equipment, among others. Aligning resources in an optimized manner can be challenging. A common method for solving optimization problems such as scheduling is linear programming. This paper discusses the utilization of a linear program to define an optimized PM schedule for the water and wastewater treatment plants, and the sustainment of the gains through tracking KPIs.