Destination Dispatch Calculator

This tool models a 40% stop-count reduction from grouping passengers by destination floor, then compares the resulting round-trip time (RTT) against conventional collective control. The three highlighted percentage outputs -- Interval Improvement, Capacity Improvement, and Rtt Improvement -- describe the SHAPE of the RTT curve, not its absolute size, and Number of Elevators cancels out of all three completely: both the conventional and destination-dispatch interval figures divide the same round-trip time by the same elevator count, so that count cancels out of the ratio between them before the percentage is ever calculated, and the same cancellation happens in the capacity-improvement ratio. A 3-elevator bank and a 12-elevator bank serving the identical floors and population show the exact same percentage improvement -- Number of Elevators only changes the absolute Conventional/DD Interval and Wait Time figures (more cars sharing the same round trip means a shorter wait each), never the percentage gain from switching systems.

Car Speed has the largest effect on Interval Improvement of the inputs that DO move it, because it changes how much of the round trip is travel time (unaffected by grouping) versus stop/door/load time (what destination dispatch actually cuts) -- travel time shrinks as the car gets faster, but stop and door-cycle time does not, so a faster building spends a LARGER share of its round trip stopped, and grouping those stops together buys a BIGGER percentage gain. At this calculator's default floor/capacity settings, raising Car Speed from 0.5 to 10 m/s moves the non-travel share of round-trip time from about 35% to about 92%, and the Rtt Improvement from about 11% to about 27%. Building Population is collected but never enters the formula: this tool estimates interval and capacity from floor count, elevator count, car capacity, and travel speed alone, not from how many people actually work in the building.