ISO 8100-32 · CIBSE Guide D
CIBSE Guide D waiting-time bands
CIBSE Guide D rates lift service by average waiting time. Use it with ISO 8100-32 handling capacity and interval — not instead of them.
Waiting time vs handling capacity
ISO Table 2 is a throughput and interval check (can the group serve the population?). CIBSE Guide D waiting-time bands describe how long passengers wait. A scheme can pass HC% and still feel poor if waits are long, or the reverse.
In the analytical up-peak check, average waiting time is taken as half the interval (full-lobby assumption). Discrete-event simulation measures waiting time from landing arrival to boarding.
How this app uses Guide D
The dashboard maps calculated or simulated average waiting time onto CIBSE service bands so you can talk about service quality in the language clients already use.
This is analysis software, not a CIBSE-endorsed product. Always read the published Guide D text for official band definitions and caveats.
Lift and elevator wording
CIBSE and ISO documents usually say lift; US practice says elevator. The same traffic problem: how many cars, what capacity and speed, and what waiting time the occupants will accept.