A responsible quote starts with the work scope, not square meters alone. The provider needs to understand surfaces, usage density, permitted work windows, safety requirements, and acceptance criteria.
For buildings and factories, the operating model also includes shifts, occupant flow, machinery, and workforce organization. In apartments, room count and current condition influence the time required.
A survey lets both parties agree what is included, how often it is done, and how exceptions are handled before price is finalized.