Estimating for a building that is still filling
Occupancy in a new scheme increases over months, and cleaning requirements increase with it. A budget set for the building at full occupancy overspends for the first year; one set for current occupancy leaves the scheme short as lots are taken up. Neither is wrong exactly, and the committee has no historical data to choose between them. The committee has no data at all on which to base the choice.
The workable answer is to price the current position with a defined review point tied to occupancy rather than to the calendar. That way the scheme funds what it currently needs and has a trigger to adjust rather than either overspending or being caught short. It also gives owners a clear explanation for why the figure will change, which avoids the appearance of an unexplained increase in year two.
