Hi.

For the love of Cecil, I cannot figure this out…

Suppose I am an inventory manager. (I’m not, but that is beside the point)

I get a delivery of 10 boxes. Each box is labeled “1 of 10”, “2 of 10”…“9 of 10”, “10 of 10”.

Now, not only do I need to verify that I have indeed received TEN boxes, but also that I have numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 specifically and not, say, a box marked “32 of 47” included in that 10.

Is there a name for this double check method of counting?

Please help!