What the walk covers that a list cannot
Where the water is. Which switch does what. Which door needs lifting to lock. Where the equipment lives and which cupboard is not ours. Which rooms are restricted and what the rule is for entering them. Where the bins go and at what time. Which surfaces have a specific method. None of this is complicated, and all of it costs a first-time cleaner an hour of confusion if it is not shown.
The walk also lets the supervisor set the sequence rather than leaving it to be invented. A cleaner working a building for the first time will otherwise start at the door and proceed until they run out of time, which on a mixed site means the last areas are the ones that matter. Fixing the order in advance protects the areas the client actually judges the service by.
