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Reblogged by slightlyoff@toot.cafe ("Alex Russell"):
david_chisnall@infosec.exchange wrote:
@ChrisMayLA6 @rejzor @NightlyBye Around 20 years ago, I read a productivity study for knowledge workers that showed productivity increased until people worked 20 hours a week, plateaued until 40, and then net productivity declined. People working more than 40 were less productive than people working 20-40 hours (sustained: short bursts of longer hours could improve productivity if they were coupled with extra relaxation time afterwards). I saw another study around 10 years ago that reproduced this result.
I was much more interested to talk to someone who studies productivity before Christmas and learn that her results had almost the same numbers but her domain of study was construction workers.
In hindsight, it’s not surprising. Making a mistake because you’re a tired builder is going to be very expensive to fix. Pour concrete in the wrong place and you may have cost several person weeks of lost effort to drill it out and pour it in the right place. Reducing the probability of making tired mistakes will typically be a net win.