Every delivery is accompanied by the criteria it was built from and the counts at each step, so the number can be checked rather than taken on trust.
Residual questions
The parts of a brief the data cannot answer, returned as questions rather than guesses.
Feasibility counts
How many records meet your criteria, with the criteria written out so the number can be checked.
Correction
Updating what has changed, wherever a current value can be established.
If mail is not arriving, we will look at the configuration and say what we find.