This document discusses techniques for material control. It defines material control as controlling the cost of materials, which typically represent 64% of total production costs. It discusses establishing reorder levels between a minimum and maximum, with the minimum being a safety stock. The reorder quantity should not exceed the maximum stock level and economic order quantity is used to reduce carrying and ordering costs. ABC analysis categorizes materials into groups for inventory control based on value and usage. Perpetual inventory records are maintained through techniques like bin cards and ledger entries.