If your operation is going to be successful, then you’ve got to have a firm understanding of your capacity: Both in terms of how much inventory you can hold, as well as in terms of the amount of work your processes can logistically handle.
For warehouses, distribution centers, and order fulfillment operations, there is no more certain way of putting the brakes on business growth and expansion than reaching (or nearing) maximum capacity—whether in terms of space utilization or throughput.
Capacity planning in order fulfillment requires the careful balancing of short-term, immediate need against long-term goals and growth.