Lift availability is a schedule constraint
During the day a tower runs several lifts and movement around the building is effectively free. After hours many buildings reduce to a single car, sometimes shared between cleaners, security staff, late-working tenants and anyone making a delivery. A cleaner who needs to move between four floors during an attendance can lose a substantial part of the visit simply standing in a lobby waiting for it to arrive.
That has a direct effect on how the schedule should be written rather than merely on how it feels to work. A pattern that requires frequent movement between floors will not deliver what it promises on paper. A pattern that completes each floor fully before moving on, with equipment and consumables staged in advance, delivers considerably more from exactly the same hours without any change in method or effort.
