The threshold is where the scope becomes visible
A shop's rear or side door onto a village street is seen by everyone who walks past. If material is swept out onto the pavement, if a bin is left standing open, or if equipment blocks the path for twenty minutes, that becomes an impression of the business rather than of the cleaning contractor. It is a small area with an effect well beyond its size.
So the scope should say plainly what happens there: material collected rather than swept out, the door closed while working where practical, waste staged inside until it is taken directly to the collection point, and the threshold itself cleaned as a named item. None of that takes long and all of it is noticed by the people the shop wants as customers. Where a bin must stand outside briefly, the scope should say for how long.
