4.4.2 Centralised versus the decentralised system
Compare the Figure 4.5 below with Figure 4.4. Here the inventory is centralised in a single warehouse which now serves as the only stock keeping unit and serves all customers in all these markets. From a decentralised system of seven independent inventory keeping units, we have moved to a central system with a single warehouse.

Figure 4.5 Centralised inventory - all markets served by a single warehouse
The benefits of centralisation can be seen from the risk pooling example and the information contained in Table 4.2 above. The relative advantages and disadvantages can be summarised as:
- Provided demand is not positively correlated across the various markets, centralisation of inventory provides reduction in the required total safety inventory.
- If the total safety inventory is kept at the same level in a centralised warehouse, the service level attainable are likely to be better than in individual stocking points.
- Overhead costs will be greatly reduced in a centralised system because there are economies of scale in a smaller number of facilities.
- Customer lead time is likely to increase in a centralised system as average distance will increase and same factor will also affect the customer response time in a negative way.
- Transport pattern will change but the net effect in terms of costs is not certain.
Reading 4.3
Evers, PT & Beier, FJ (1998) 'Operational aspects of inventory consolidation decision making', Journal of Business Logistics , vol. 19, no. 1, pp.173-189.