How Many Volunteers Does Each Shift Need?
Set places for busy and quiet periods in Proximatic. People choose their shifts, and you can see whether the lunch rush still needs three more volunteers.
Count the work that has to happen at the same time. A lunch station might need one person portioning, two handing out meals and one keeping supplies coming. That's four people during service, even if ten volunteers offered to help at some point in the day.
When the line settles down, one person serving and one replenishing may be enough. Give those periods different capacities in Proximatic: four places for the rush, two for the later shift. Put the actual duties with each so volunteers can see what they're taking on.
The signup turns those staffing decisions into a crew. People choose an available place, and your roster shows the names against each period. If the later shift fills but only one person takes the rush, you need three more for the busy hour. You can ask for those three people while there is still time to fill the rush.