He wrote the questions back during the bad old days when a lot of shops tried to measure developer productivity in KLOCs.
Understanding the context, something similar today might be "How many story points will this take your team?" and if the answer is anything specific, the project is in trouble . . .
You just plan for things differently. The workers you mention are commodities, so it's easier to plan for them.
My father needed to design assembly lines that were safe enough for tweaked out workers who may not have slept for days to work on. Those were just his design constraints. True story.
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