It can be a little confusing to look at all three options in 4-36-2 and try to figure out which one applies. I find it more helpful to think of them as an ordered list. Check 'em off one at a time; go with the first one that applies. Don't even consider the third option unless the first two don't cover the sitch.
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"It is not enough to do your best; you must know what to do, and then do your best." - W. Edwards Deming
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