Allow for non-billable time, then compare available hours with the workload you expect. Start with repair orders, parts invoices and technician time logs. Each example below uses hypothetical values you can replace.
Capacity with a Contingency Buffer
Reserve delivery capacity for variability before promising work.
Deliverable units = floor(hours × (1 − buffer) / hours per unit)
Show example inputs and result
| Available delivery hours | 640 |
|---|---|
| Hours reserved for disruption | 15 % |
| Hours per service order | 4 |
Result: 136 units.
The reserve is your scenario assumption; it is not a universal staffing recommendation.
Open capacity with a contingency bufferMonthly Delivery Capacity
Estimate delivery capacity from usable labour hours.
Capacity = staff × hours × utilization / hours per sale
Show example inputs and result
| Delivery staff | 4 |
|---|---|
| Available hours per staff member | 160 |
| Billable utilization | 65 % |
| Hours per service order | 8 |
Result: 52 sales per month.
Availability, nonbillable time, and hours required per sale determine the delivery throughput.
Open monthly delivery capacityRequired Delivery Staff
Estimate whole staff equivalents required for a delivery target.
Required staff = ceiling(sales × hours per sale / (hours available × utilization))
Show example inputs and result
| Monthly sales target | 100 |
|---|---|
| Labour hours per service order | 6 |
| Available monthly hours per staff member | 160 |
| Billable utilization | 70 % |
Result: 6 staff.
The tool estimates whole staff equivalents. Part-time schedules and overtime require a separate staffing plan.
Open required delivery staffFully Loaded Labour Cost
Convert staff cost into a delivery-hour cost for pricing.
Loaded cost = (pay + employer costs + allocated overhead) / productive hours
Show example inputs and result
| Annual gross pay | 45,000 |
|---|---|
| Employer benefits and payroll costs | 10,000 |
| Allocated annual staff overhead | 5,000 |
| Productive annual hours | 1,500 |
Result: 40 per productive hour.
Productive hours exclude leave, training and non-delivery time. Enter employer charges from your own payroll records.
Open fully loaded labour costOvertime versus Extra Staff
Compare entered overtime expense with an additional staffing cost.
Overtime cost difference = extra hours × overtime rate − extra staff monthly cost
Show example inputs and result
| Extra hours needed monthly | 80 |
|---|---|
| Overtime hourly cost | 45 |
| Monthly extra staff cost | 4,000 |
Result: -400 monthly cost difference.
Check actual available hours, skills, schedules, and service requirements before using a cost-only comparison.
Open overtime versus extra staffUse the results in your plan
For a tire shop business, review tires, consumables, and fitting labour across the complete workflow. Use one consistent period and delivery unit: a service order. Compare the assumptions with recorded outcomes after delivery, then update the estimate.
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