Why the shift report and the month end never agree
The gap between a shift report and a month end figure is almost never arithmetic. A supervisor reports what moved using truck counts against a nominal payload. Finance reports what was weighed, and survey reports what the volume says. All three are honest and all three measure something slightly different. Until a site decides which one is the production number and which ones are supporting measures, every operations meeting spends its first twenty minutes arguing about whose figure is correct instead of discussing what happened underground.
Timing does the rest of the damage. Assays come back from the lab days after the material moved. A downtime event gets recoded once the fitter has looked at it properly. A contractor confirms hours the following morning. So the shift figure is provisional by nature, and a system that treats a posted number as final forces people to correct it somewhere else, which in practice means a spreadsheet that then becomes the version everyone quotes.
Building for that reality is straightforward once it is accepted. The production record carries its own lineage: where the figure came from, when it was captured, when it was posted and which revision it is. Restatement becomes a normal operation with an audit trail rather than an embarrassment. Reports state the time they were produced, so a number quoted on Tuesday can be explained on Friday without anyone having to reconstruct what the data looked like at the time.
- One agreed production figure per shift, with the supporting measures kept alongside it
- Capture time and posting time recorded as separate fields
- Restatement handled inside the system with a visible audit trail
- Provisional and confirmed figures distinguished on the face of the report
- Every report stamped with the as at time it was produced