Correction policy
Some of these tools are wrong. That is a statement about arithmetic at this scale, not modesty — and it is why there is a policy.
Three ways a tool can be wrong
The formula can be wrong, and then every result is wrong. The reference data can be out of date, and then the result was right last year. Or the wording can mislead — the arithmetic is correct but the label says something the number does not mean. These are three different repairs with three different delays, which is why a report that says which one it is gets fixed faster.
What to include in a report
Four things make a report reproducible, and a reproducible report gets fixed: which tool, the exact values you entered, the result you got, and the result you expected with the source that says so. The last one matters most — disagreement about a number is usually disagreement about which reference is authoritative.
What we do with it
A wrong formula is corrected and deployed. Out-of-date reference data is re-read from its published source and its verification date moved forward — never moved forward without re-reading, which would be the same lie in a newer font. Misleading wording is fixed in all six languages at once, because a label that is wrong in French is wrong in the other five.