S = number of hours an employee needs to sleep to be useful (this varies person to person)
C = commute time to the work location
M = maintenance time (how much time a person needs to do minimal human maintenance, eating, relaxing, showering etc)
So the upper bound on N should be:
N <= 24 - (S + C + M)
Now this doesn't take into account burnout etc. So another factor B, should be put in the equation. It represents the time an employee needs to spend on non-work things (hobbies, family, friends, going to the pub, whatever) to refresh themselves for work and prevent burnout.
The average person seems to have these sorts of values:
S = 8
M = 2
C = 1
so assuming no B (extremely unlikely), this puts 13 as an upper bound on N for long term. However a normal 13 hour day is a LOT. I know for me B is around 2 or 3 and a lot of people think I'm nuts on how much time I spend doing work. I should note, in my case, B is actually higher, however aspects of my work also count towards B - I love my job, and so can spend more time at it in a sustained way because of the "fun" or "paid hobby" aspects of it.
S = number of hours an employee needs to sleep to be useful (this varies person to person)
C = commute time to the work location
M = maintenance time (how much time a person needs to do minimal human maintenance, eating, relaxing, showering etc)
So the upper bound on N should be:
N <= 24 - (S + C + M)
Now this doesn't take into account burnout etc. So another factor B, should be put in the equation. It represents the time an employee needs to spend on non-work things (hobbies, family, friends, going to the pub, whatever) to refresh themselves for work and prevent burnout.
The average person seems to have these sorts of values:
S = 8 M = 2 C = 1
so assuming no B (extremely unlikely), this puts 13 as an upper bound on N for long term. However a normal 13 hour day is a LOT. I know for me B is around 2 or 3 and a lot of people think I'm nuts on how much time I spend doing work. I should note, in my case, B is actually higher, however aspects of my work also count towards B - I love my job, and so can spend more time at it in a sustained way because of the "fun" or "paid hobby" aspects of it.