DuPont schedule: 12-hour rotating shifts

Who uses it

The DuPont schedule is common in operations that never stop: manufacturing plants, utilities, chemical and processing facilities, emergency services, security and some healthcare settings. It is popular because of the long block of seven consecutive days off in every cycle. For an overview of other patterns, see our guide to types of work shifts and the glossary entry on rotating shifts.

The 28-day cycle

Each team works the same sequence, offset by one week from the next team:

Over 28 days, each employee works 14 shifts of 12 hours, a total of 168 hours, which averages 42 hours per week. With four teams offset by a week, there is always one team on days and one on nights.

Overtime under the FLSA

Because federal overtime is calculated per workweek, the important question is how the cycle falls into your seven-day workweeks. The weekly hours are very uneven. If the workweek starts on the first night shift of the cycle, the four weeks look like this:

Even though the average is 42 hours, this alignment builds in 48 overtime hours per employee every four weeks for non-exempt employees. Other alignments spread the hours differently, but averaging across weeks is never allowed. Your workweek must be fixed and cannot be changed simply to avoid overtime, so model the cost before adopting the pattern. In states with daily overtime, such as California, hours over 8 in a day may also be overtime; see daily overtime rules.

Fatigue and the six-shift week

In the alignment above, week 2 contains three day shifts followed, after one day off, by three night shifts. That is a demanding stretch: 72 hours in seven days with a switch from days to nights. Plan it carefully. Make sure the single day off is protected, discourage extra overtime shifts during that week, and give supervisors clear guidance on watching for signs of fatigue. Some organizations adjust the pattern slightly to soften this week, while keeping the long break at the end of the cycle.

Pros

• A full week off every four weeks, which many employees value highly.
• Only two shift changes per day, so fewer handovers than 8-hour patterns.
• Fewer commuting days per year compared with five 8-hour days a week.
• Equal share of nights, days and weekends across teams.

Cons

• 12-hour shifts are long and can be tiring, especially on nights.
• Switching between day and night shifts within the cycle can disrupt sleep.
• Some stretches include four 12-hour shifts in a row.
• Built-in overtime in some weeks raises labor cost.
• Covering absences can mean very long days for colleagues if not planned.

Making it work

1. Check the overtime cost by mapping the cycle onto your workweek.
2. Plan relief cover for vacations and absences, for example with a fifth relief team or float staff.
3. Set clear handover routines at each shift change.
4. Support rest and fatigue management: schedule meal and rest breaks and watch for excessive extra shifts.
5. Agree on a fair process for shift swaps so people can manage personal commitments.
6. Review the pattern with employees after a few months.

Covering vacations and absences

With only four teams and 12-hour shifts, one absence leaves a gap that someone has to fill for 12 hours. Common solutions include a small relief crew that works fill-in shifts, cross-trained day workers who can step in, or a rule that vacations are taken during the seven-day break where possible. Avoid relying on people from the team that just finished a night shift, and track how often each employee covers, so extra shifts are shared fairly and overtime stays visible.

Rolling out a new pattern

1. Explain why you are considering the change and share a sample calendar.
2. Show how pay and overtime will work for a typical four-week cycle.
3. Collect feedback and preferences, especially on team assignments.
4. Set a start date at the beginning of a workweek, with clear transition rules.
5. Review after two or three cycles and adjust.

DuPont vs. other 12-hour patterns

The best pattern depends on your operation, your team’s preferences and local rules.

Scheduling DuPont teams in EZTime

EZTime scheduling lets you build shifts for each team and repeat them across weeks, while employees see their upcoming shifts in the mobile app. The time clock records actual hours, and overtime alerts help managers see when extra shifts would push someone into additional overtime.

Frequently asked questions

Where to go next