Negotiating before establishing scope
Bargaining over the price of work that may not have been a change at all.
General contractors, subcontractors and construction managers

For Developers, Owners & Public Entities
Change-request questions may concern scope, pricing, time and how the request was administered. Analysts may consider quantities, assumptions, notice records, submission history, responses and supporting information in the project context.
Time is the element most often missed on this side too. Accepting a change priced for cost alone may settle the money while leaving the schedule consequence unresolved and unrecorded, which tends to reappear later as part of a larger and less tractable claim.

Possible assignment considerations
Read the contract documents together to determine what the original scope required, and record that reading.
Check quantities against the drawings and rates against their component assumptions rather than against expectation.
Assess overhead, markup and rate provisions as the contract provides rather than by negotiation from a total.
Determine and record any schedule consequence at the point of settlement rather than leaving it open.
Considerations and limitations
Bargaining over the price of work that may not have been a change at all.
Meeting an underived lump sum with another one, which turns a testable question into a contest of nerve.
Pricing a change order while leaving the request for extension of time open can leave a separate question to resolve later; the review addresses both.
Change Order Requests Analysis
Also in this practice