The definition of flow in the operations department is the continuous movement of goods, equipment and people throughout your warehouse.

A primary objective is to decrease the amount of high traffic zones. To do this the staff members locations for each task are to be as close as possible to the tasks before and after it. Goods that the staff require in carrying out the tasks will need to be as close as possible to the workstation.

The next objective to achieve is the minimising of movement and interruptions to staff as much as possible.

To maximise the warehouse space consider the following:

Inventory,
How much inventory will be stored?
Size of the inventory
Receiving and dispatching zones of inventory

Office areas, and
  What is the location of the operations staff members office and desk areas?

The racking and storage areas.
Size of the aisle spaces
Height of the racking structure
Materials handling equipment