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Calcimator

Virtual Waiting Room Calculator

Expected wait time from appointment scheduling and duration.

Inputs

Results

Average Wait Time (min)

999

Probability of Waiting (%)

100%

Average Queue Length999
Provider Utilization (%)125%
Max Sustainable Rate (/hour)8.2
Providers for <5 min Wait11
How to Use This Calculator
  1. Enter the number of patient appointments per day and the average wait time in minutes.
  2. Set the percentage of patients who use the virtual waiting room vs. in-person check-in.
  3. Input the staff time saved per patient using automated check-in in minutes.
  4. Review the Daily Staff Hours Saved and the Annual Cost Savings from reduced front-desk workload.
  5. Use the Patient Satisfaction Score Improvement estimate to support the business case for the tool.

What each input means

Patient Arrival Rate (/hour)
Average number of patients arriving per hour (scheduled + walk-in virtual visits).
Average Visit Duration (min)
Average length of a telehealth consultation in minutes.
Available Providers
Number of providers simultaneously seeing patients.
Buffer Between Visits (min)
Minutes between visits for charting, preparation, and transition.

What each result means

Average Wait Time (min)
Expected average time a patient waits in the virtual queue before being seen.
Probability of Waiting (%)
Chance that an arriving patient will need to wait (vs immediate connection).
Average Queue Length
Average number of patients waiting in the virtual room at any time.
Provider Utilization (%)
How busy providers are on average. >85% risks long waits.
Max Sustainable Rate (/hour)
Maximum patient arrival rate at 85% utilization (comfortable capacity).
Providers for <5 min Wait
Minimum providers needed to keep average wait under 5 minutes.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Patient Arrival Rate (/hour) = 12, Average Visit Duration (min) = 20, Available Providers = 4, Buffer Between Visits (min) = 5 = 4 input(s) provided
  2. Calculate Average Wait Time
    999 = 999
  3. Calculate Probability of Waiting
    100 = 100%
  4. Calculate Average Queue Length
    999 = 999
  5. Calculate Provider Utilization
    Provider Utilization = utilization * 100
    125 = 125%

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