Experiment
Your Little Café
A made-up café on a made-up Saturday. Aroha, Ben and Mei aren't real. Fix the roster so every half-hour has enough people. Nothing is saved unless you choose to carry it into the free roster generator.
At 11:30: 2 of 3 needed people are rostered (Aroha, Ben) — short by 1.
Saturday roster
Change the start or finish times and watch the café fill in.
10 half-hours are short of staff.
Like how this works? Put your own staff on these shifts and keep editing in the free roster generator.