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Calcimator

Destination Dispatch Calculator

Wait time improvement from destination dispatch system.

Inputs

Results

Interval improvement (%)

22.9%

Conventional interval (s)23.3
DD interval (s)18
Conventional avg wait (s)11.7
DD avg wait (s)9
Capacity improvement (%)29.7%
Conventional stops/trip8.6
DD stops/trip5.1
Rtt Improvement (%)22.9%
How to Use This Calculator
  1. Enter Number of floors, Number of elevators, and Car capacity (persons).
  2. Set Building population, Car speed (m/s), and Floor-to-floor height (m).
  3. Review the Interval improvement (%) (%) result.
  4. Use Conventional interval (s) and DD interval (s) to inform your decision.

How the result changes with Car speed (m/s)

Car speed (m/s)Interval improvement (%)
1.4518.3%
3.8224.1%
6.6726.3%
9.0527.1%

What each input means

Number of floors
Total floors including ground floor.
Number of elevators
Total elevator cars in the bank.
Car capacity (persons)
Rated capacity per elevator car.
Building population
Total above-grade building occupants.
Car speed (m/s)
Elevator rated speed in meters per second.
Floor-to-floor height (m)
Typical floor-to-floor height.

What each result means

Interval improvement (%)
Percentage reduction in lobby departure interval with destination dispatch.
Conventional interval (s)
Average time between car departures with conventional collective control.
DD interval (s)
Average time between car departures with destination dispatch.
Conventional avg wait (s)
Average passenger wait time with conventional control.
DD avg wait (s)
Average passenger wait time with destination dispatch.
Capacity improvement (%)
Increase in 5-minute handling capacity.
Conventional stops/trip
Expected stops per trip with conventional control.
DD stops/trip
Expected stops per trip with destination dispatch (grouped passengers).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Number of floors = 15, Number of elevators = 6, Car capacity (persons) = 16, Building population = 500 = 6 input(s) provided
  2. Calculate Interval improvement
    Interval improvement = ((intervalConv - intervalDD) / intervalConv) * 100
    22.9 = 22.9%
  3. Calculate Conventional interval
    Conventional interval = rttConv / numElevators
    23.3 = 23.3
  4. Calculate DD interval
    DD interval = rttDD / numElevators
    18 = 18

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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