Why every number should carry its source

Ask anyone who has inherited a model they did not build: the first thing you do is distrust it. Where did this rent come from? Is this expense the actual or the budget? Which version of the rent roll is this? Until you can answer those questions, the model is not an asset — it is a liability you have to re-verify.

This is the quiet tax on every deal. Models change hands — from analyst to associate, from associate to investment committee, from the buy side to a lender's credit team — and at each handoff, trust has to be rebuilt from scratch. The number is only as good as your ability to trace it.

So we made tracing the default, not an afterthought. In Framecast, every figure in a model is a link. An in-place rent points back to the clause in the lease. An expense points to the row in the operating statement. A reconciled variance points to both documents it was drawn from. There is no figure on the page whose provenance you cannot see in a single click.

This is harder than it sounds, because it means the platform has to remember not just the value but the path — the document, the page, the location on the page, and the logic that turned raw text into a modeled number. We treat that lineage as a first-class part of the data, carried with the figure wherever it goes.

The payoff is that a Framecast model survives handoffs. When it reaches the investment committee, the committee is not asked to take the analyst's word for it. They can interrogate any number to its source in seconds. The conversation moves from “do we trust this model” to “do we like this deal” — which is the conversation that should be happening.

Sourcing is not a feature we added. It is the premise the whole product is built on. A number you cannot trace is a number you cannot stand behind, and in this business, standing behind the number is the entire job.