In this example, increasing available staffed minutes from 480 to 528 changes the result from 8 appointments to 8 appointments. All other inputs stay the same.
Try this with your own numbersFormula and worked example
Slots = floor(staffed minutes / (service minutes + turnaround))
| Input | Example |
|---|---|
| Available staffed minutes | 480 |
| Service duration | 45 minutes |
| Turnaround per appointment | 15 minutes |
| Calculated result | 8 appointments |
Choose reliable inputs
Separate parts, technician time and bay availability for each repair order. For this mobile mechanic calculation, use repair orders, parts invoices and technician time logs and a consistent definition of one repair visit.
- Parts: include the portion belonging to this repair visit or reporting period, and record where the value came from.
- Travel: include the portion belonging to this repair visit or reporting period, and record where the value came from.
- Diagnostic time: include the portion belonging to this repair visit or reporting period, and record where the value came from.
Use the same currency for every money input. Do not mix weekly costs with monthly revenue, or count the same expense in both an itemised cost and allocated overhead.
How many appointments fit when turnaround is included?
Subtract breaks before entering available minutes. This model uses one identical service duration.
What if this input changes?
If available staffed minutes rises by 10%, this example changes by 0 appointments. This shows the effect of one change; it does not predict what will happen.
Open the calculator, save your baseline, then change the input supported by the least reliable estimate in your records. Compare both scenarios before committing to a price or capacity promise.