Unknown is not zero
If Assay cannot price a model, it records the usage without a cost.$0.00 would claim the work was free.
Every total keeps the unpriced share visible.
A wrong figure is corrected, never rewritten
Assay adds a correction and keeps the original beside it. You can reproduce last quarter’s report, then see why the current figure differs. A model the table still cannot vouch for gets no correction. Nothing is estimated from an average.A measured zero is not an unknown
“This cost nothing” and “we cannot measure this” are different facts. Product reports keep them in separate buckets. Merging them would print a hole as a finding.Two readings, both named
Where a question has two honest answers, Assay prints both and labels which is which.- Inclusive — an upper bound that does not partition.
- Weighted — the estimate, and it does partition.
Every ratio names what it excluded
Waste, cost-per-outcome, token yield, and ROI compute over priced spans only. Each report carries the count and share it left out. ROI with no declared value is undefined, not −100%.A zero is rendered with its reason
$0.00 recoverable, a 0% token yield, a $0 cost-per-outcome — each is a result conditioned on something. The surface says what.
A snapshot says it is a snapshot
A static export stamps the capture instant, the store, the version, the window, and the filters. It ends with: these numbers do not update.A label states its source
Declared, judge, or heuristic. A reader can see which, and the rank is always: declared > judge > heuristic Assay validates that a declared label is in the vocabulary. It does not check that the label is true. A producer that marks every sittingbuild:feature gets a clean, useless aggregate — reported faithfully.