Lead with the engagement data: Gallup’s 2025 finding that 21% global engagement has cost $438 billion in productivity, and that boosting engagement could add $9.6 trillion to global GDP. Then quantify the local impact: for your team at your average salary, a 10% productivity improvement from physical environment investment generates how much annual value? Compare that figure against the investment required. In virtually every knowledge worker organisation, the productivity recovery value exceeds the investment within the first year.