Identify the true peak window
Seasonal businesses may have a short inventory build followed by a rapid drawdown. Capacity planning should distinguish the build period, selling peak and post-peak residual inventory.
Separate volume from SKU proliferation
A peak caused by more units of existing products behaves differently from one caused by many temporary SKUs. The second may consume more locations even if total cube is similar.
Compare temporary options
Overflow storage, 3PL capacity, short-term space, supplier timing changes and cross-docking may be alternatives to permanent expansion. Compare total cost and operating complexity, not rent alone.
Plan the exit
Temporary overflow should have a defined start, end and movement plan. Otherwise inventory can become stranded in secondary locations and continue creating double handling long after the peak.
Practical questions
Should I use one utilization percentage for every warehouse?
No. Inventory profile, storage system, seasonality, staging demand, handling equipment and workflow can make the same percentage perform very differently in two facilities.
Can this guide be used to approve a rack or building change?
No. It is a planning resource. Structural, fire, building, accessibility and workplace-safety requirements must be established for the actual facility by the appropriate qualified parties and authorities.