The Supervisor checks once per week and verifies the operator's readings by doing a set of their own. The Production Manager (And I understand the Div Mgr) will do this once per month to verify and look at 5s and other company level activities.
This is nothing more to me than 3 checks (Actually, up to 9 checks per week) of a given process. . . more eyes looking at things from a different perspective.
The real benefit is that the system requires immediate correction of anything found. We selected this frequency because it makes sense for the staffing here. The scheduling and amount of audits is always alterable. . .if there is such a word.
With the current schedule across 15 cells on 3 shifts, we'll get about 15,000 actual process checks across the board.