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Distinguish the reported states
| Entry | Interpretation |
|---|---|
| Measured zero under the stated method | A recorded outcome |
| No disclosure | Unknown from that source |
| Not applicable | A boundary/category assessment to document |
| Estimated amount | A modeled value with assumptions |
Inspect a partial total
If sites A and B report amounts but site C has no record, the A+B sum is a covered subtotal. Inserting zero for C changes unknown into a numerical claim. Report coverage and investigate the missing source.
Label any replacement value
An estimate can be useful when its method, inputs and uncertainty are documented. It does not become measured data because it appears in the same spreadsheet column. Preserve a status field beside the value.
Carry coverage into intensity
A denominator covering three sites paired with emissions covering only two can distort a ratio. A mathematically computable value is not automatically a comparable intensity. Review numerator and denominator coverage together.