I don't know what it means in civil but here in my office when I interview someone,but could not get right assessment of his capabilities,In that case I offer him interim salary, and thats interim valuation of person.

what are uses?

I case person don't perform to expectation he can be asked to leave with out investing too much.so one can save mony.

Hope you can fit this analogy to your filed.

Sounds like homework to me.

for a contract, you use interim valuations to pay the contractor a certain amount of money based on what has been effectively done. this allows the contractor to keep his assets a bit more fluid.