A complete revision of the industry-standard book on materials requirements standards for manufacturingThis thoroughly revised guide offers the current and next generation of supply chain professionals a clear explanation of the fundamentals of planning and MRP systems in today's volatile and complex supply chains. Long considered the industry standard, Orlicky's Material Requirements Planning is an indispensable tool for manufacturing practitioners and candidates preparing for certification exams including CPIM, CSCP, DDPP and MRPFP. Streamlined and reorganized, this fourth edition brings clarity and focus to the prerequisites, choices, inputs, outputs, latest techniques and challenges associated with modern MRP systems across a variety of industries including project, custom, batch, repetitive and continuous process manufacturers. Included is the latest evolution of MRP logic including the increasingly popular DDMRP derivative and its components.Orlicky's Material Requirements Planning, Fourth Edition covers: The history and context of planningThe true purpose of planningProduct structure dataInventory dataThe demand data inputMRP processing logicMRP inputs, outputs, decision, and the user experienceMRP applied to different industriesFixing planning in the VUCA worldDDMRP approach and configurationDDMRP planning and executionAdapting and completing the DDMRP modelAnd much more