Access requirements are an input, not a detail
In most buildings, access is a practical matter settled after the scope is agreed. In a controlled facility it shapes the scope itself. If a crew must be escorted, the work takes longer and needs somebody from the site available. If individuals must be approved in advance, the contractor cannot substitute freely, which affects continuity and cover for absence. Both of those change the shape and the cost of the work before a single area has been discussed.
Pricing without establishing those requirements produces a number that will not survive contact with the site. Clean Best asks about approval, escorting, induction and record-keeping at the walkthrough, and states in the proposal what has been assumed. Where the site later changes a requirement, both parties can see immediately which assumption has moved and what it affects. Nothing then depends on an arrangement that was assumed rather than confirmed with the site.
