Source-to-report mapping documents, per datapoint, where it originates, what processing it undergoes, and where it lands in the final report, so the entire journey from raw source to published figure is explicit and checkable rather than something only one person in the organisation actually understands. Without this mapping, a figure in the final report is effectively a black box that nobody can independently verify or reconstruct if questioned.

What the mapping actually captures

For each datapoint: the original source system or document, every transformation it goes through (aggregation, unit conversion, normalisation), who touches it at each step, and exactly where it appears in the final published report, a complete, traceable chain rather than a general description.

Why this matters most when someone leaves

The most common way this traceability breaks down is when the one person who understood a particular figure's origin changes roles or leaves the company. A documented mapping survives that transition; institutional knowledge held in one person's head doesn't.

How this connects to assurance readiness

An assurance provider's first question about any figure is usually "where did this come from and how do you know it's right." Source-to-report mapping is the direct answer to that question, prepared in advance rather than reconstructed under time pressure once an assurance engagement has already started.

A Tool on Top of a Broken Process Just Gives You Neater Reports of the Same Unreliable Numbers

We treat sustainability data the way finance treats financial data, owners, definitions, controls, and a traceable trail, before we ever touch software.

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