Zoning a building with mixed uses
A Smithfield industrial building may hold a production area, a chilled store, a packing hall, a general warehouse and an office, all connected by shared circulation. Each has a different hygiene expectation, and the risk is not that any one of them is cleaned badly but that equipment or soil moves between them and undermines the strictest zone.
Zoning solves it at low cost. Each area is assigned a colour, each colour has its own cloths, mop heads and buckets, and those sets are stored apart. The order of work runs from the highest hygiene requirement to the lowest, never the reverse. A relief attendant can follow that system on their first night without needing site history. Recording the zone map on a simple plan, displayed where equipment is stored, is what keeps the system visible rather than documentary.
