All three need the same view of what was assessed. None of them will accept the others seeing what it cost to produce.
What they pay a steel supplier and what labour actually costs per floor is their competitive position, and the owner will tender the next project.
What has been set aside and what the consultant is being paid is not the contractor's business.
They record what they measured. They are not asked to see the commercial terms on either side of them.
We run what the certificate sits on and hold no standing in it.
What helps most is the real sequence on a project you worked on, including how long a certificate actually took.