2 types of inventory models:
1. Fixed Reorder Quantity System - It is a system where an alarm is raised when the inventory level drops below a fixed quantity and inventory is restocked based on demand.
2. Fixed Reorder Period System - It is a system where an alarm is raised after a fixed period of time and inventory is restocked based on demand.
The following situation are:
1. Supply kitchen with fresh food - Both Fixed Reorder Quantity System and Fixed Reorder Period System are suitable for this situation. Reason: Food is considered basic need. Certain food items are stocked when the inventory level drops below a fixed quantity and certain food items are stocked after a fixed period of time, both as per demand.
2. Obtaining daily newspaper - Fixed Reorder Period System is only suitable for this situation. Reason: Subscription is renewed only on completion of the fixed period.
3. Buying gas for your car - Fixed Reorder Quantity System is only suitable for this situation. Reason: Gas for your car is something you buy when the level of inventory drops below a fixed quantity and hence used.
4. Ordering the game sweater for the community baseball game - Fixed Order Period System is only suitable for this situation. Reason: Game sweater is required only during the game and you will order/buy the game sweater during the game only.