- Material Requirement Planning (MRP)
- A production-planning methodology that calculates the materials and components needed to manufacture a product, when they are needed, and in what quantities β used to coordinate purchasing and scheduling.
- Bill of Materials (BOM)
- A structured list of all raw materials, components, sub-assemblies, and quantities required to produce one unit of a finished product.
- Lead Time
- The elapsed time between placing a purchase order for materials and receiving them at the point of use β a critical constraint in MRP scheduling.
- Safety Stock
- A buffer quantity of inventory held above the calculated minimum requirement to absorb demand variability or supplier delivery delays without halting production.
- Planned Order Release
- A scheduled instruction generated by an MRP system authorizing the purchase or manufacture of a specific quantity of material on a specific date.
- Net Requirements
- The quantity of a component actually needed after accounting for on-hand inventory and stock already on order β the output that drives purchasing decisions.
- Lot Sizing
- The rule or policy used to determine how much of a component to order at once, balancing ordering costs against carrying costs β examples include fixed-quantity, lot-for-lot, and economic order quantity.
- Allocation
- A supplier's commitment to reserve a defined quantity of a material or component for a specific buyer during a constrained supply period.
- Change Order
- A formal written instruction modifying the quantity, specification, delivery schedule, or pricing agreed in the original material planning document.
- Demand Forecast
- A projection of future material consumption, typically expressed in weekly or monthly quantities, shared by the buyer with the supplier to allow advance production or procurement planning.
- On-Hand Inventory
- The physical quantity of a material or component currently in the buyer's possession and available for production use.
- Shortage Protocol
- The agreed procedure for allocating available supply among competing demands when a supplier cannot fulfill a planned order in full or on time.