Re: human timescales, I have also run into this in my career. I wrote calibration and test software a few years ago, and it didn’t matter if a test took 1 minut

Re: human timescales, I have also run into this in my career. I wrote calibration and test software a few years ago, and it didn’t matter if a test took 1 minute, 3 minutes, or 10 minutes, because those were all “push the button, sit there and wait” scale. 15-30 minutes is “push the button and take a short break.” 60-90 minutes is “push the button, go to lunch,” and so on. We had tests that ran for up to 24 hours, but, when optimizing, it didn’t matter if I could make it run faster, unless I could get it down below 8 hours, because that was the next fastest time scale.