I think you can get more done by working longer hours...up to a point, and for limited amounts of time. Loss in productivity still means the total work output is going up. I think the break-even point is 60h / week.
Does that figure take into account that the bug rate that you produce at 60h/week is going to be higher than at 40h/week?
Does that figure take into account that the bug rate that you produce at 60h/week is going to be higher than at 40h/week?
Sort of. My opinion takes that objection into account.
But on the other hand, I don’t have any data to quantitatively refute or support your point.