Round Robin and the Elevators Scheduling at My Block
Talking about round-robin, I am reminded of the elevators at the block of flats where I live. I've been frustrated at the elevators before. Sometimes when I call for the elevator, I can tell that 2 of the lifts are in transit (going somewhere, with or without passangers). Sometimes only 1 out of 3 is in transit. When I call the lifts, I expect one of the lifts that are parked to be mobilised. Instead, the logic that drives the lifts assignment lets that lift go in the opposite direction, then come to a rest, (either to drop off some passenger or park itself), then wakes itself again, to come to my level.