Advanced Planning and Scheduling (APS) is a computer-aided system that assists in the planning, scheduling and control of production processes. It typically uses sophisticated algorithms to identify the most efficient ways to produce a given product or service. It helps to optimize the use of resources, such as machines, materials and personnel, by taking into account constraints such as capacity and availability. APS also helps to improve customer service by ensuring that orders are delivered on time and products are of the highest quality.