A building systems company is sizing maintenance contracts and wants a per-park daily figure.
Estimate the number of lift trips in a large Bengaluru tech park on a working day. State assumptions and sanity-check.
100 points, 60% to pass.
Chain: number of people in the park, trips per person per day, people per lift trip. The term that separates good answers is trips per person: arrival and departure is two, but lunch, meetings across towers and stepping out add several more, so four to six is defensible and two is not. Dividing by people per trip matters because lifts carry groups — a trip is not a person. Sanity-check by dividing the total across the number of lifts and the working hours, and ask whether the resulting trips per lift per hour is physically possible.