A small operations model is useful only when the inputs mean the same thing every time.
01 / CAPACITYChoose the denominator deliberately.
Calendar capacity is vehicles multiplied by days in the selected period. Serviceable capacity subtracts downtime that genuinely prevented a rental. Report both utilization figures rather than removing downtime silently to make performance look better. This workbench assumes the same vehicles are in the fleet for the whole period. If cars join or leave mid-period, split the calculation into smaller periods or use a day-level fleet ledger.
02 / REVENUEContribution is not net profit.
The estimated contribution here is booked vehicle-days multiplied by a realized daily rate, less the variable cost you enter. It excludes financing, depreciation, insurance, storage, salaries, taxes and other fixed costs. Use a realized rate after discounts and refunds, not the highest advertised day rate. Refundable deposits are not rental revenue. This is a planning calculation, not an accounting statement.
03 / OPERATIONSKeep the reason for every unavailable day.
Cleaning, scheduled maintenance, repair and owner use have different operational meanings. Record the reason and dates at vehicle level before aggregating totals. Separate an inquiry, an accepted quote and a confirmed booking. Do not count a WhatsApp click as a lead or a reservation. The current workbench calculates local inputs only; a connected CRM with access controls and synchronized customer records remains a separate product phase.