Shift rotations 2/2, 3/3, and 24/72: which to choose

In short. A shift rotation is a rhythm of work and rest, not a guarantee of coverage. 2/2 gives frequent rest, 3/3 means fewer transitions, and 24/72 means few shifts a month at the cost of a long shift. Any rotation must be checked for coverage gaps by department and day.

"Which rotation should I choose - 2/2 or 3/3?" is a common question. But on its own it's incomplete. A rotation sets the rhythm; whether it covers the right number of people on the right days is a separate question.

What is a shift rotation?

A shift rotation is a repeating rhythm of workdays and days off. 2/2 means two workdays, then two off. 3/3 is three on, three off. 24/72 is a 24-hour shift, then three days of rest. Shift work is common: by the International Labour Organization, about 20% of the world's workforce works shifts.

The rhythm matters for the team: it determines how predictable an employee's life is. But for the business, something else matters more - whether the chosen rhythm covers demand every day.

2/2, 3/3, and 24/72: how they differ

Each rotation has its own balance of predictability and load.

Pattern	Rhythm	Pros	Risks
2/2	2 on / 2 off	Frequent rest, predictability	More shift transitions
3/3	3 on / 3 off	Fewer transitions, longer rest	Longer work block
24/72	24h shift / 3 days off	Few shifts per month	Fatigue in a long shift

No rotation is "better" in general. 2/2 suits places where evenness matters. 3/3 - where fewer transitions pay off. 24/72 - where it's acceptable by the nature of the work.

How to choose a shift rotation

Start from your conditions, not from fashion.

• Load by day. If peaks are uneven, a flat rotation will give either too much or too little.
• Nature of the work. A long shift doesn't fit everywhere - in some places it hurts quality and safety.
• Predictability for the team. A stable rhythm retains people better than a chaotic one.
• Coverage. The main criterion: does the rotation cover the right number of people every day?

What matters more than the rotation - coverage

Any neat rotation is useless if there's no one to work on Saturday. So choosing a rotation is the first step, and the second is checking coverage. How many people each department needs on each day, and whether the chosen rhythm covers it.

Smengo shows the whole team for the month on one screen regardless of rotation and counts coverage by department. How to find coverage gaps early is covered separately, how to build the schedule in six steps in another, and you can try it free, no card.