Separate missing attendance from refilled capacity
Start with slots already scheduled within one chosen period. The assumed no-show rate gives expected missed slots. The refill rate applies to those missed slots, not to the whole scheduled total. Refilled slots have the same duration. The model neither creates a waitlist booking nor decides whether a customer may cancel.
| Assumption or result | Value |
|---|---|
| Scheduled slots | 200 |
| Assumed no-show rate | 10% |
| Expected missed slots | 20 |
| Refill share of missed slots | 25% |
| Expected refilled slots | 5 |
| Expected unused slots | 15 |
Is the 25% refill share applied to 200 scheduled slots or twenty expected missed slots?
Show the worked answer
To the twenty missed slots: 20 × 25%=5 refilled, leaving fifteen unused. Applying it to all two hundred would invent fifty refills from only twenty missed slots.
Keep expected capacity separate from observed attendance
| Quantity | Calculation | Result |
|---|---|---|
| Unused slots | 20 − 5 | 15 |
| Unused minutes | 15 × 45 | 675 minutes |
| Unused hours | 675 ÷ 60 | 11.25 hours |
Expected values may have fractions: three slots at a ten-percent no-show rate produce 0.3 expected missed slots. That is an average under the assumption, not a partial booking or an attendance record. The chart partitions scheduled capacity into attended-as-scheduled, refilled and unused components; the table preserves exact reading without relying on colour.
If all twenty missed slots can be refilled, how much capacity remains unused?
Show the worked answer
Zero under this model: the refill rate is 100%, so twenty are refilled and no missed capacity remains unused. This does not mean no one missed the original booking.
Measure attendance and successful refill separately when reviewing the assumptions. This calculator has no revenue, refund, fee or staffing-cost model and gives no actual customer outcome. Use the separate booking planner when you need feasible start times and resource availability.