This document discusses various inventory control techniques used in pharmaceutical companies. It describes ABC analysis which divides inventory items into three categories based on their value and consumption. High-value items that consume most of the budget are category A and require strict control. Economic order quantity technique is used to determine optimal order quantities to minimize total costs. Perpetual inventory system continuously records receipts and issues to facilitate regular checking. Slow-moving and obsolete items are periodically reviewed. Input-output ratio analysis relates raw materials used to final outputs. Maintaining proper inventory control is important for smooth operations and maximum profitability.