It often feels like there are only 3 productive hours in typical American white collar work day.
What if we just cut out the rest?
Edit: Some great responses. So responses must have also been said about the 5 day and 40 hour work weeks.
For many jobs, it won't change much. My advisor comes to the university 3 days a week, and stays for 4 ish hours. But he's a very good researcher with high research output. (I do math, this might not be possible for lab based researchers.)
Usually these jobs can't be measured in hours you spend in your workplace. You're kind of always working since you can't really turn your brain off while working on an interesting problem, but what others see is that you're sipping coffee with your laptop open.
I thoroughly believe that 4 hours is the limit for most people (on most days) on how long they can focus deeply on a problem. That was at least my experience as a mathematics grad student. In math this is more evident because most of high level math requires this deep level of understanding.
Of course one thinks about these problems while doing other things (obsession is a common consequence of prolonged deep thinking), which is why visits to the restroom, walks outside and so on are famous to prove very productive.
Either way, math is also social (most problem solving benefits from discussion) and it is in my opinion much more productive to set some time off for talking about / working on stuff with others than grinding through longer. This is still work and incidentally also good time and resource management.
Of course. My friends who are doing research on Physics or Biology tell me that I always seem to be free. The truth is, I'm always kind of working. It's very hard to shut off your brain when you're tackling with some intriguing problem. I've found myself thinking about work while out with the boys for drinks lol.
Sadly we are so obsessed with squeezing "productivity" en masse out of the workforce. We rarely justify technology or process enhancements that result in fewer hours worked. We generally optimize how much we get out of each hour worked. I have always had an issue with this.
Take AI for example, we are seeing some tasks automated or accelerated by AI powered tools. However, I have not heard any employers state how their employees will be able to get their work done in fewer hours. I only ever hear how people will get more done during their work hours.
The system in this way is very much broken. In an ideal world, you'd get paid for the outcome and not the hours worked, but that is not a working relationship many outside of entrepreneurs and consultants have.
As a non-white-collar worker, I always find conversations like this very alienating. The idea of being on the clock while not working is bizarre to me.
Why would you be on the clock? You work 3 hours and that pays enough money.
you get up at 12 and start to work at 1, take an hour for lunch and then at 2 you're done.
Ok. Let's say we have 4 hour workdays, 4 day work weeks. Not just for white collar.
A business would require to hire 2 more people to cover a 24h continuous prosuction line (3 8h shifts to 5 4h shifts).
there would be more employment and higher productivity. More happiness I suspect.
I'd take it.