Three zones and the equipment that must not cross between them
Clinical zones are treatment and procedure areas. Semi-clinical zones include the areas patients occupy without treatment: waiting, corridors, the public toilet. General zones are administrative and staff areas with no patient presence. Each needs its own colour-coded cloths, mop heads and buckets, stored separately and never rotated. This is the single control that most reliably distinguishes a scope written for a clinic from one written for an office.
Sequence matters as much as equipment. Work moves from the lowest risk area to the highest, or with a full change of equipment between them, so nothing is carried backwards. The plan writes this out explicitly rather than assuming the cleaner will infer it. A relief attendance is exactly the situation where an unwritten convention fails, and it is also the situation where the practice has least visibility over what happened.
