Full definition
Minimum quantity of a spare part that must be held in the warehouse to guarantee availability during the replenishment period. Calculation: Minimum stock = Average daily consumption × Supplier lead time (days) + Safety stock. Safety stock absorbs demand and delivery time variability. For critical Class A equipment spares, an additional contingency factor is added. Reorder point (ROP) activates the purchase order. Managed in ERP/CMMS with automatic alerts. Annual review based on actual consumption history.