I can only imagine what Germans that are agitating for a 28 work week( for proper work-life balance) think of Americans working 45-50 hrs a week?
Slaves to corporate America?
I can easily super vastly improve on what the Germans are agitating for
and what the Americans already do:
If it weren't for religious impediments, I would be a stronger advocate of the 4 day week, with 3 days work and 1 day off (with simple rule that no worker
ever work more than 3 days in a row,
period). The main benefit is better rested workers with less compounded physical and mental drain than the 7 day (5 work + 2 off) week, also avoiding the 5+2 hammer effect of an overly-long weekend hardening those 5 day harms, and a toxic effect of infinite-seeming 5 day work weeks that just kill workers faster than something less insane like working only 3 days in a row.
For planning, the nice thing about such a binary compatible work week is that you can evenly distribute the day off through only 4 unsick people and have 100% even coverage of the days, with 3 unsick people working every day. If you want 24 hours a day, then you only need 12 unsick people. Of course, putting in sick people, people with other days off, etc., requires more, but spread over more workers or spread over a more variable work day, you can have about 1 in 4 be substitutes, and have them doubled-up when no one is sick. So, about 15 people for 24 hours, or 5 people for all days one shift.
If we consider that each worker is working similar number of hours per day per worker in the 4 day (3 on 1 off) week as they do in a 7 day week with 5 on 2 off, then we get to some simple math:
(3/4) / (5/7) = 1.05
That's 5% more hours working per worker in the 4 day (3 on 1 off) week compared to the 7 day (5 on 2 off) week.
Legally, it's not too hard, since there is such a thing as an 8 day work week in the federal and state systems; at least there was back when I was driving trucks circa 2001 (they may have changed). 4 day weeks shoehorn into 8 day "legal" weeks simply by putting two weeks into one week (legally speaking). (Of course, your internal week rules would be more stringent: no worker would ever be allowed to work more than 3 days in a row.
All of your internal calendars, communications, scheduling, etc., would be with the 4 day week; legally, the lawyers would just run a computer program for the 8 day week to handle edge cases that basically never come up if you
never rotate a worker's day off, and always leave the day off the same for every worker, and always enforce the
no more than 3 days in a row working rule.)
In terms of rest potential, the nearest day off in a 4 day week with 3 days on work and 1 off day off work is always 1.5 days away: you are already benefiting from the rest of x days ago while about to rest again in y days, where (x+y)=3, (x+y)/2=1.5.
7 day weeks with
5 contiguous working days and 2 days off are treacherously awful in comparison: (x+y)=5, (x+y)/2=2.5. 2.5 / 1.5 = 1.6666. 66% further from rest, but that lack of rest compounds once your body is worn out, so days 4 and 5 (of working) are not made better by day 6 (off day)*; they are merely awful, body draining, health attacking, work damaging days.
Worse, in a 7 day week, you are battered to hell for 5 days, then put to safari for a WHOLE WEEKEND, your body then getting into a state of not wanting to ever work again by the 2nd day off, and then the whole fiasco is REPEATED AGAIN!!!
The 4 day work week's best benefit is never making someone work more than 3 days in a row. They come to work more rested, more healthy, fewer mistakes, less brain damage, less problems, more efficiency. The fact you get a 5% bonus more hours out of each worker is just amazing considering the other benefits; I was worried when I first dreamed up the 4 day work week that it would actually cost hours, but in fact, it adds hours! Win win win!
(Final version: this message seems proofread and correct.)
* I always found it helpful to number the week with Sunday being 0 and Saturday being 6, since that neatly offers days 1-5 as work days, and you don't have to do awful math to figure out the conversion from week day number to contiguous work day number, since they are simply the same number. I.e., Day 1 = weekday 1 = work day 1. Very easy. Also, math is easy even if you want to add, multiply, subtract, etc. I suppose in the 4 day week, the same standard would apply, with 0 being a day off and days 1-3 being days on, but since we're evenly distributing the day off for some workers in assembly lines, I suppose you could approach it as either each worker has their own 0 day alignment, or just say that each worker has a different day off alignment. For non-assembly line workers, I suppose you could normalize and synchronize that 0 day is always day off for everyone on the same day, but I don't know how many people would realistically have the same day off, considering that one tool to make the 4 day (3 on 1 off) week compatible with 7 day (5 on 2 off) week workers is to make every position (even engineering, accounting, sales, office, executive, etc.) an evenly distributed day off 4 day week, to have as many people also working when they are needed when the 7 dayers come calling (customers, homogulators, etc.).
P.S., never rotate days off and never rotate shifts; doing either is DEATH! (Maximum frequency of changing shift or day off should be approximately once per year, and even if done only once per year, should always be across days off and in a progressive direction, perhaps over the course of 10 or 30 days or so.) (A minor exception in a spaceship is progressive rotation since humans prefer 25 hour days according to some studies, but that doesn't apply exactly to the 4 day week, and that also messes with biorithyms which do react to sunlight and temperature; that would be easier to program in a spaceship than on a planet. Also, if you aligned such a spaceship day to 25 hours, then it wouldn't be progressive any more; it would merely be a longer day. So, really, no exception.)