Sustainability & Compliance

Carbon and compliance calculations are only as good as their emission factors, and this is the category where a plausible-looking number does the most damage. Factors here are editable inputs with typical published ranges offered for orientation, never fixed constants — the spread between two suppliers of nominally identical concrete routinely exceeds thirty percent, which is larger than most of the savings people go looking for.

Each page also states its assessment boundary, because most disagreements about a carbon figure turn out to be disagreements about scope. Cradle-to-gate excludes transport, construction, use and end of life; location-based and market-based electricity accounting give different answers for the same building. Neither is wrong, and reporting one while describing the other is.

The occupational-health pages are compliance from the other side of the site hoarding. The arithmetic of a noise exposure, a vibration dose or an 8-hour average is fixed by the regulation that defines it, so the uncertainty lives entirely in the measurements fed in. Each page sets its figure beside the action and limit values its named regulation uses — and stops there, because what a figure requires of an employer is decided by the risk assessment, not by a calculator.