This estimator models the effect of no-shows for an emergency-department service stream that actually uses scheduled or pre-arranged slots, such as certain follow-up, fast-track, referral, or return-visit workflows. It is not meant to describe ordinary unscheduled emergency arrivals.
For applicable scheduled streams, the calculator estimates missed visits, released appointment or treatment time, and optional value at risk. If your ED does not schedule the modeled visits, a no-show metric is not appropriate and another demand or abandonment measure should be used instead.
Inputs
visits
%
min
$
Result
—
Expected no-shows
Expected missed visits—
Released reserved time—
Estimated value at risk—
1. Confirm the workflow is scheduled Use this tool only for ED-related visits that have a defined expected arrival or reserved slot.
2. Enter scheduled volume Use the number of booked visits in the planning period.
3. Add the no-show rate Use an observed rate for the same workflow when available.
4. Set reserved time and optional value Enter the time held for each visit and an internal per-visit planning value if needed.
5. Review impact Compare missed visits and released time with your ability to backfill or redirect capacity.
Expected no-shows = Scheduled visits × No-show rate %
Released time = Expected no-shows × Reserved minutes per visit
Value at risk = Expected no-shows × Value per visit
What the result means
The result is the expected number of booked ED-related visits that fail to arrive in a scheduled workflow.
This metric should not be applied to unscheduled emergency demand. It also differs from patients who arrive and leave before evaluation.
Given: 60 scheduled return or referral visits; 8% no-show rate; 40 reserved minutes; $150 planning value per visit.
Calculation: Expected no-shows = 60 × 0.08 = 4.8. Released time = 4.8 × 40 = 192 minutes = 3.2 hours. Value at risk = 4.8 × $150 = $720.
Result: 4.8 expected no-shows, 3.2 released hours, and $720 modeled value at risk.
Interpretation: Across comparable scheduling periods, the assumptions imply about five missed visits per 60 bookings.
Is this for normal walk-in emergency visits?
No. Ordinary ED demand is unscheduled, so no-show terminology is not meaningful in the same way. Use this only for a genuinely scheduled ED-related stream.
Is a no-show the same as leaving without being seen?
No. A no-show never arrives for a scheduled visit; leaving without being seen occurs after arrival and reflects a different patient-flow issue.
Can released time be reused?
Possibly. Same-day backfilling, walk-in demand, or flexible staffing can recover some capacity, so released time is not automatically lost time.
Why is the expected count fractional?
It is a statistical expectation based on the rate. Actual missed visits in any period are whole numbers.
How can I evaluate an improvement program?
Compare the current no-show rate with a post-intervention or target scenario while keeping the other assumptions constant.