ED Wait Time Calculator accuracy and testing

Formula source

• Net capacity = treatment capacity x (1 - acuity buffer). Wait minutes = waiting patients / net capacity x 60.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• The calculators use simple transparent formulas rather than vendor-specific analytics models.
• Inputs are processed locally in the browser and are not stored by Calwarden.
• This does not triage individual patients or predict clinical priority.

Unit handling

• Waiting Patients accepts numeric values.
• Treatment Capacity accepts values in patients/hr.
• Arrivals per Hour accepts values in patients/hr.
• Acuity Buffer accepts values in %.
• Net Capacity is displayed in patients/hr.
• Arrival Utilization is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log