Margin Movement Traceability

Situation

A mid-market construction operator was producing monthly board packs where the same margin movement was sometimes explained as 'productivity' and sometimes as 'rework' — depending which finance team-member assembled it.

The board could see the number was moving but had no consistent narrative attaching deltas to operational reality.

Discipline installed

Margin movement register with narrative templates replacing ad-hoc commentary. Each delta carries a category, a source pointer (project, instruction, recovery line) and a written narrative.

Exception log captures unexplained movements over a threshold; the monthly board pack assembles from the register rather than being rebuilt each month.

90-day shift

Each monthly margin delta carries a recorded narrative and evidence pointer. Board questions became 'why this category' rather than 'what does this number actually mean'.

Auditor sampling on margin movement narrowed dramatically because every line was already source-pointed.

Governance gate reinforced

Reinforces the evidence-and-narrative non-negotiable: every reported margin movement is traceable to operational record, not finance interpretation alone.