Point-of-sale audit

Its output is not the report but the action: it is useful if what is detected reaches whoever can fix it while the campaign is still running. An audit whose findings are read the following month documents the loss instead of preventing it.

It is worth separating it from the sales visit. When the same person sells and audits, the audit tends to soften: nobody reports harshly on the store they will be negotiating with next week.

What is worth measuring about the audit itself is its correction rate: how many findings were resolved and in how long. It is the only number that distinguishes an audit that improves execution from one that merely documents it.