In message , at 17:32:17 on Fri, 14 Oct
2016, tim... remarked:
The only reason that you keep such designers on a retainer after they
have completed the design is to make sure that the buiders actually
build to the design and that's going to be a minimal amount of work.

It's most of the work

don't be silly

architects fees for overseeing build works are usually 5% of the build
costs (and the retainer is going to be a percentage of that)

It's most of the work done by the architects.

(see the way Cambridge CC botched monitoring BAM Nuttall delivering
the Guided Busway).

This was a major project undertaken by an authority that didn't usually
undertake such major projects

That it went wrong proves nothing

It proves that you need to spend years monitoring the build and the
snagging, not after you've spent not very long drawing up enough plans
to get the project funded.
--
Roland Perry