External areas fail differently from internal ones
Indoors, condition declines gradually and predictably. Outdoors it changes with weather, season and events outside anyone's control. A car park can be acceptable on Friday and covered in leaf litter by Monday after wind, and a bin bay can go from tidy to a genuine problem in a single collection cycle. Frequency therefore has to be set with more tolerance for variability, and the plan should say what triggers an additional attendance.
The methods differ too. External hard surfaces need sweeping, litter collection, drainage clearing and periodic pressure washing where the surface tolerates it, none of which resembles internal floor work. Equipment, water access and waste disposal all have to be arranged. Treating external areas as an extension of the internal routine underestimates all of this and is why they are so often the weakest part of a service.
