Daily incoming demand = incoming orders per hour × modelled hours. Orders handled = the smaller of incoming demand per hour and the scenario’s handling capacity per hour, multiplied by those hours.
Unserved demand = incoming demand minus orders handled. Daily gross order value change = (proposed orders handled minus current orders handled) × average order value. The monthly comparison multiplies this difference by your selected operating days.
Unused handling capacity does not create orders. Check these assumptions against comparable operating periods and measure accepted, fulfilled and paid orders separately during a pilot.