At our company which handles General Contracting for construction we NEVER use 4, 10's if possible. Jobs running 5, 8 hour days always run on schedule better i

At our company which handles General Contracting for construction we NEVER use 4, 10's if possible. Jobs running 5, 8 hour days always run on schedule better in the long term it seems (talking 2-3 year building projects) based on past anecdata. You would think giving the guys an extra day off to rest would help but actually being present on the 5th day tends to be very important when there are major milestones to be hit. I've seen 4, 10 hour shifts. I've seen 3, 12 hour shifts + 1, 4 hour shift. I've seen 5, 8 hour shifts The schedules created to run 5 days a week always work better. Now there is a case to be said for having shorter shifts so we can get out of our 40 hour funk zone here in America. I think if you ran a job where only the foreman/superintendents had to be present for 8 hours while the workers worked say 5, 6 hour shifts or even 5, 7 hour shifts would still be better and on time more frequently than pushing someone for 40 hours over fewer days.