A Maintenance Management Systems (MMS) is a software system for handling maintenance scheduling and maintenance work orders, as well as associated inventory, purchasing, accounting, and human-resources functions.
In some industries, particularly process-production manufacturers use MMS to optimize the use of capital-intensive equipment, by finding maintenance schedules which minimize disruption to production. Some MMS have their own financial and purchasing functions. In other cases, integration with ERP is used to provide these functions.