Budgets allow administrators to provide guidance to department managers when creating schedules. Budgets also help administrators track actual vs. budgeted hours and intervene when too many or too few hours are scheduled.
Each business or organization can calculate their budgets using different methods. Many scheduling applications restrict department hours using hourly wages. We feel this is less than optimal and impossible for certain industries.
You can calculate your budgets using various methods like units sold, revenue, historical staffing, etc. Find what works for your company or organization and then convert your findings to hours. Over time, you will have actual hours from previous periods to help guide you.
Budgets basically help optimize your staffing needs.