The document discusses the economic order quantity (EOQ) P model for inventory management. The P model involves reviewing inventory levels and placing replenishment orders at fixed time intervals. Some key points: - Inventory is reviewed and orders placed at predetermined times, like every 10 days for a sales rep. - It is used for bulk materials and services that are replenished regularly at set periods. - Safety stock accounts for variability in demand and lead times to ensure a certain service level of demand is met. - Formulas show how to calculate order quantity factoring in demand, lead time variability, safety stock level, and other variables. - Several examples demonstrate applying the P model concepts and formulas to sample inventory