A Master Production Schedule (MPS) is a detailed plan used to manage the production of finished goods within a company. It is a key tool used by production planners to determine how many of each item should be produced, when it should be produced, and when it should be delivered. MPS typically takes into account customer orders, forecasted demand, available capacity, and supplier lead times. There are two main types of MPS: fixed-time and rolling. A fixed-time MPS is used when production is planned on a fixed timeline, such as a month or a year. A rolling MPS is used when production is planned over a rolling period, such as a week or two weeks. In both cases, the MPS is used to ensure that production is meeting customer demand and that sufficient inventory is available to meet demand.