[RKDinOKC]

Where I work the emloyees in manufacturing and assembly work 4, 10 hour shifts and work either Mon-Thur or Tue-Fri, they run both a day and a night shift like that.

Not sure why. Seems like 5, 8 hour shifts with 3 shifts a day would keep the machines running 24 hours a day instead of just 20. There have also been studies done that shows if employees work more than 8 hours a day for very long they start screwing up and quality drops.

When I was managing the drafting and graphic arts department I talked this over with my guys and we did a test. Worked 10 hour days like production. In only 2 weeks they saw that they had to start spending more time fixing mistakes they had made that they would not have normally made. They saw the department actually lost productivity. We switched back to 8 hour days. They also decided if we needed overtime to finish projects they would rather come in on Saturdays than work longer days. Again because they felt like it was more productive.