Consider a SKU that has been allocated more than one location within a warehouse that is organized by "shared storage".

You have two options for order picking:

1) Picking from a single location will empty it sooner so that it will become available for reassignment.

2) Allowing Picking from either of the multiple locations can be more convenient for order-picking because the SKU is likely to be closer to the order-picker.

Which of these two policies is better for space utilization?