PRACTICAL GUIDE / 08
How to calculate staffing levels for a shift.
Start with the work that must be covered, not a target headcount. A useful staffing level is the number of people and roles needed for a specific period, adjusted for overlap and real availability.
A simple coverage formula
Required people = required roles × simultaneous coverage periods. Then check whether the people assigned can cover those roles and times. If one person can cover two roles only at different times, do not count them twice for the same period.
Worked example
A café needs one barista, one front counter person and one shift lead between 08:00 and 11:00. That is three simultaneous roles, so the minimum coverage is three people for that period. If the shift lead is also trained on the counter, that flexibility can help later—but it does not remove the need for three people at the busiest moment.
Write down what the work requires.
Find the periods where roles run at the same time.
Match availability and skills to the requirement.
Do not confuse headcount with a workable rota
The number can be correct while the schedule is still wrong. Check unavailable times, requested days, overnight boundaries, rest and required skills before publishing.
Make the calculation repeatable
Keep coverage requirements with the scheduling period, then review gaps and clashes before sharing the current rota. That is the workflow Shift Helper is designed to support.