It’s 9:47pm on a Sunday. The dishwasher has been running for an hour. Bob has texted to say his sister’s wedding is on Saturday — yes, this Saturday. Alice can’t open Tuesday because of a dentist she forgot to mention. The roster is twenty-seven percent full and you have not yet looked at hours.
You do this every week. Every week. Some weeks twice — because someone accepts a shift on Tuesday morning and quietly backs out Friday night, and the whole thing has to come apart and go back together while service is on.
Rosie is the smallest possible answer. A rostering tool that builds the schedule for you, sends it to staff, lets them swap, and shows you the cost before you publish. Browser, phone, iPad. Roughly the price of a flat white per person, per month.
You could keep doing it the way you do it. Most people do. But there’s a Sunday night where the kitchen closes and you go home — and the roster’s already done.