Where this applies
A cost-review framework for internal warehouses and third-party fulfillment. Labor safety, product controls and customer commitments remain mandatory constraints.
Gather first
- Orders and order lines by size, units, channel and service requirement
- Labor hours, packaging, storage and receiving costs for the same period
- Errors, reships, returns, dispatch timing and inventory adjustments
A repeatable method
Define the denominator
State whether an order means an accepted order, a shipment or a completed customer order. Split shipments can inflate the count and make cost per shipment appear better while customer-order cost rises. Keep cancelled orders and test orders identifiable.
Keep cost boundaries consistent
Separate fulfillment from outbound postage unless both comparisons include it. Allocate shared receiving, occupancy and systems costs using a documented method. Compare a warehouse’s full cost with a provider’s full quote, not only its pick fee.
Inspect the order mix
A single-line order and a multi-line fragile order require different work. Segment the sample before comparing periods or providers. Look for minimums, long-term storage, peak fees and return processing in the contract.
Pilot with quality and safety measures
Test a bounded sample and monitor mispicks, damage, dispatch timing and worker safety. OSHA identifies ergonomic and material-handling risks in warehouse work. Do not trade safe procedures for a temporary throughput improvement.
Add the exceptions back into the unit cost
Assumptions: Illustrative monthly USD costs for 2,000 shipped orders with comparable mix. Fulfillment excludes outbound freight, returns and taxes. Included costs: labor $6,000, packaging $1,000, allocated storage/receiving $2,000 and rework $500.
- Total included fulfillment cost = $6,000 + $1,000 + $2,000 + $500 = $9,500.
- Cost per shipped order = $9,500 ÷ 2,000 = $4.75.
- Ignoring rework would show $4.50 and understate this defined cost by $0.25 per order.
What this means: This is a cost allocation, not a market benchmark. If a provider quotes $3.00 for pick-and-pack only, obtain the missing storage, receiving, packaging and exception charges before comparing it with $4.75.
Common mistakes
- Do not mix a per-unit pick fee with a per-order total.
- An improvement in average speed can conceal a worse tail of late or damaged orders.
Questions worth asking
Is automation always the next step?
No. First establish the bottleneck, volume, mix and error pattern. Compare a bounded process change with an automation proposal using the same cost boundary.
Which service metric belongs beside cost?
Use the customer commitment: for example, orders dispatched by the promised cutoff, plus accuracy and damage rates with explicit denominators.
Sources, dates and limits
The linked primary sources support the specific concepts described below. The examples and decision checklists are original illustrative analysis, not figures supplied or endorsed by these organizations. A check date is not a claim that a rule, price or contract will remain unchanged.
- OSHA: Warehousing Hazards and Solutions
Publication date not shown · Checked 2026-11-05
Warehouse ergonomic and material-handling hazards. Does not supply a productivity target or validate a facility safety program.
Use the current source, your actual shipment documents and qualified advice where needed. This guide does not book freight, settle a dispute or determine a legal obligation.