What does WCD stand for? ("whole case delay"?) Are we supposed to know? If you mean for it to be opaque, you could signal that by putting it in quotes ("WCD metric") the first time.

Hm, I could've sworn I spelled it out somewhere abovet, but can't find it now. "Weighted Customer Delay". It's roughly analagous to TDD (Throughput-Dollar-Days) from the Theory of Constraints, only measured in customer-hours rather than dollar-days.