Notes
The other sections are practical. These are positions, and several of them are uncomfortable for one side or the other. For a related perspective on workplace measurement, this guide.
On the argument. Rate disputes, capacity problems, service failures and safety findings in freight are frequently the same argument about an undefined interval, appearing in four departments with four vocabularies. It never resolves because the quantity is undefined, the records are asymmetric, and the costs land unevenly. For broader industry reporting and context, see project44.
On where it comes from. The facility controls nearly every input to dwell — doors, labour, appointment density, shift patterns, gate processing. The carrier controls arrival time and nothing else. The cost lands on the party least able to affect it, and every other feature of the problem follows from that. The receiving side's complaints about undocumented invoices are also accurate; both are true.
On the convention. Two hours became universal without anyone deciding: written down, copied between documents, never defended, eventually believed to be regulation. The same mechanism is operating right now on start events, on-time definitions and geofence radii.
On measurement. The technology to measure dwell precisely exists and is largely installed, and the data still does not, because a shared clock is unwelcome to almost everyone who could produce it.
On who bears it. Fleets of twenty-five trucks or fewer show the highest dwell of any group, and have the least documentation, the least leverage and the least representation in the research describing it. Those facts are connected.
And against dashboards — including the one a facility installs in good faith, which measures the mean, from check-in, across modes, daily, and closes a question that should stay open.
Against the Dashboard
A screen showing average dwell is worse than no screen, because it displays the one statistic that cannot be acted on.
Everyone Is Arguing About Time
Rate, capacity, service and safety disputes in freight are all one argument about an interval nobody has defined.
Detention Is a Facility Problem
The invoice is a symptom and the dock is the cause. Why the party that can fix it is the one least exposed to the cost.
The Clock Has Four Readings
Shipper, receiver, carrier and broker measure the same visit differently, and each reading is honest. That is the whole problem.
The Measurement Nobody Wants
Precise dwell data is technically easy and commercially unwelcome, and understanding why explains the state of the whole field.
Safety and Billing Are One Argument
Detention is discussed in two vocabularies by two departments who never meet. They are describing one interval with one cause.
Small Fleets and the Data Gap
The operators with the worst dwell have the least evidence and the least leverage. What is available to them, and what is not.
What the Two-Hour Rule Taught
A convention with no authority became universal because it was easier than thinking. The lesson generalises beyond detention.