In the retail supply chain today...

...stores guess what consumers will buy and place orders or transfer requests.
...retailer DCs guess what the stores will need and place orders.
...suppliers guess what their customers will order and schedule production.

It's like setting up 100 dominoes and putting each of 100 people in charge of kicking over one domino at precisely the right time.

But if you set up the dominoes correctly, only a single push is required and the chain reaction takes care of the rest - no matter which design you choose.

In the retail supply chain, the replenishment needs of the stores, DCs and manufacturing plants only exist by way of a chain reaction of the demand started by the consumer.

Why not model and plan the supply chain the way it actually operates?