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Aggregate planning looks at the medium-term horizon, typically 3 to 18 months. It treats the factory's output in broad terms—such as total tons of steel or total hours of labor—rather than focusing on individual part numbers.
The book is structured to guide the reader through the evolution of production systems to advanced, automated, and integrated methods. Part I: Foundations of Production Systems
The Master Production Scheduling phase breaks down the aggregate plan into specific, time-phased realities. The MPS dictates exactly what end items will be built, and precisely when. It serves as a vital contract between the sales department and the production floor, stabilizing the factory environment against daily market fluctuations. 4. Material Requirements Planning (MRP)