Find the wait
Start with the receipts that run long most often. Time unloading, checks, staging, task release, and putaway separately. When the same wait recurs at one handoff, change its rule or owner and compare similar loads afterward.
01 · Define the clock
Start and end the clock at defined events
For one site, agree on a start event and an end event before comparing results. A practical start is unloading at the assigned door. A practical end is accepted putaway in the WMS. If inventory becomes available later, report that system delay separately. Trailer queue time before the door is useful, but it is not the same interval.
System events
- Appointment, arrival, and assigned door
- Receipt, exception, and task-release timestamps
- Accepted putaway or stock-available event
Visible events
- Unload start and finish
- Receiving check and staging dwell
- Movement to the putaway handoff
Keep separate
- Incomplete receipts and missing endpoints
- Load type, shift, and exception class
- Camera gaps, occlusion, and timestamp drift
02 · Locate the delay
One receipt, several possible delays
The total can grow for different reasons: doors are unavailable, unloading pauses, receipt checks create exceptions, staging space is full, putaway tasks are released late, or forklifts wait for the next handoff. Keep each interval for the same receipt so a fast unload does not hide a long staging wait.
- Match comparable receipts. Compare similar shipment classes, appointment conditions, and shifts.
- Review the tail. Use the median and a high percentile, plus incomplete-event share. Averages alone can hide repeated outliers.
- Open the supporting clips. Review the visible wait before assigning the cause to labor, space, scheduling, or equipment.
03 · Match the fix
Match the fix to the delay
| Observed delay | First change to test | Evidence to compare |
|---|---|---|
| Before the door | Appointment spacing, arrival rules, or door assignment. | Arrival-to-door time and occupied-door availability. |
| During receiving checks | Document readiness, exception ownership, or inspection sequence. | Check duration, exception type, and resolution time. |
| In staging | Space allocation, task release, or downstream availability. | Staging dwell, occupancy, and putaway-ready time. |
| During movement | Travel route, dispatch rule, or equipment coverage. | Loaded moves, waiting, route obstruction, and completed receipts. |
04 · Test one change
Test one receiving change
Choose one receipt class and a representative set of shifts. Record the definition, sample size, exclusions, missing events, median, high-percentile time, and completed receipts. Compare the same conditions after one operational change. Keep the source timestamps and supporting footage with each exception.
Discuss your receiving flowReferences
Sources
- Fortune AI warehouse measurement protocolDefinitions, sampling, acceptance rules, and limits for warehouse measurements.
- GS1 Logistic Label GuidelineHow logistics-unit identifiers connect physical units with electronic records.
