Indices show what happened, not where the cost committed
A research and knowledge function inside a construction and property firm kept being asked the same question: where does the cost of a building scheme get set? A construction index moves with the price of materials and labor. What it cannot show is which decisions on a scheme committed the cost. By the time a price is negotiated at tender, most of the outcome is already fixed by choices nobody goes back to.
Answering it needs three seats: a quantity surveyor who has priced the work, a project director who has watched the design commit the cost, and a subcontract manager who knows where the real risk gets priced. The firm also needed something it could keep, so this was a knowledge problem as much as a research one.
We built a reference the firm could keep
We convened a round table of people who had held the seats rather than advised on them: former quantity surveyors, project directors and subcontract managers. Because the question was about how a scheme unfolds, we sourced for people who had lived each stage. The session was scoped so the output would sit in the firm’s knowledge base rather than expire with one project.
It was chaired to produce a sequence rather than a discussion: where cost commits, in what order, and what is still open at each stage. Where the view from the cost side and the view from site disagreed, the room worked the difference through, because that is where the practical guidance sits.
An answer the firm stopped having to find again
The round table produced a working sequence of where cost commits on a scheme, with each stage attributed to the seat that had lived it. The value showed up in reuse rather than in one project. The same reference answered the question for several teams over the following period, and it is indexed in the firm’s own systems so project teams can find it.
It also changed the advice the firm gives its clients. Attention moved earlier in the program, to the stage where the decisions that set the cost are still open.
