Payment waits where the two entries disagree.
The contractor says the slab is done. The engineer says it is four fifths done. Both enter their own figure, neither sees the other, and the bill stops on the row where they differ.
Nobody has to be wrong for this to be useful.
Most disagreements on a site are honest ones. A quantity measured on a different day, from a different corner, by a different tape. Writing both down and dating them turns a month of argument into one row that needs settling.
The bill moves on the matched figure. The held row keeps both numbers and the time each was entered, so the difference is a conversation with a date on it rather than an argument.
Thirty five booked. Twenty nine walked in.
Read at the gate as they arrive, trade by trade. The gap shows up at half past seven in the morning, while it can still be fixed, instead of on a muster typed up on Friday afternoon when it is only a number to be explained.
What the site meeting stops being about.
Is the stage actually done?
The contractor and the engineer enter the same stage separately, without seeing each other. The bill moves on what both recorded and stops where the two differ.
Who was on site, and for how long?
Read at the gate as people arrive, per trade, rather than a muster written up on Friday for the whole week.
Where is the excavator today?
Plant and tools on the map, with hours run per machine. Idle hire is easier to argue about when the machine kept its own record.
Why is this bill held?
Because two people entered different numbers on the twenty second. Both numbers are on the row, with the time each was entered.
Which of my sites is behind?
Stage progress across every site on one scale, so the site that needs a visit is obvious from the office.
A record that was made on the day.
Everything here is captured where the work happened, by the person who saw it, at the time they saw it. That is the only version of a site record anybody trusts six months later.
Quantity and date, entered twice and independently.
Matched, held or waiting. A held row keeps both figures and both timestamps.
Read at the gate, by trade, with first in and last out.
Position and hours run for every machine on hire.
Issued, returned, or still with someone who left at four.
Tied to the stage and the day rather than sitting in a gallery on one phone.
Runs on whatever is already fitted.
A card or a face at the gate, a tag on the machines worth tagging, a phone in an engineer's pocket for the entries. Sites are rough on hardware, so the less of it the better.
Try it on one package.
One package, one running bill, both sides entering. If the held rows are not worth the trouble, you have lost a month and learned something.
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