A delivered container does not return to the available pool immediately.
Match the event to time
An empty waiting at a branch is a different state from an asset on route.
Field check
Timestamp delivery, unloading, collection notice, return, washing and release separately.
Track a cohort
- Dispatch and unit ID
- Branch and unload
- Collection and return
- Wash and release
Calculate delay within the same dispatch cohort; review delayed cases as well as the median.
Separate on-route units from empties unavailable in the pool to locate the bottleneck.
Before adding units, correct collection ownership and the waiting stage.
