Chapter 9 Inventory management
Figure 9.1 Inventory management is the activity of planning and controlling accumulations of transformed resources as they move through supply networks, operations and processes
Figure 9.2 Inventory is created to compensate for the differences in timing between supply and demand
Figure 9.3 Inventory management has a significant effect on return on assets
Figure 9.4 Inventory profiles chart the variation in inventory level
Figure 9.5 Two alternative inventory plans with different order quantities (Q)
Figure 9.6 Inventory-related costs minimise at the ‘economic order quantity’ (EOQ)
Figure 9.7 Inventory profile for gradual replacement of inventory
Figure 9.8 Re-order level (ROL) and re-order point (ROP) are derived from the order lead time and demand rate
Figure 9.9 Safety stock(s) helps to avoid stock-outs when demand and/or order lead time are uncertain
Figure 9.10 The probability distributions for order lead time and demand rate combine to give the lead-time usage distribution
Figure 9.11 Pareto curve for items in a warehouse