What is sustainability? What it actually means for a company

The most widely used definition of sustainability comes from the 1987 Brundtland Report: meeting today’s needs without compromising the ability of future generations to meet their own. The definition has stood for forty years; what has changed is how a company is expected to demonstrate it.

The three pillars

The concept is framed in three dimensions, and an outcome does not count as sustainable unless all three hold. The environmental pillar means using resources no faster than they renew; the social pillar means protecting human wellbeing and rights; the economic pillar means the activity paying for itself.

The third pillar is often skipped and is decisive in practice: an environmental improvement that cannot pay for itself is reversed at the first downturn. Which is why life cycle costing is the complement to environmental assessment, not an afterthought.

What changed at company level

A decade ago corporate sustainability meant good photographs and statements of intent in an annual report. In Europe it is now moving under the same regime as financial reporting: same report, same management responsibility, independent assurance. Declaring is not enough; it has to be measured, documented and audited.

The practical consequence: sustainability has stopped being a communications job and become a data job. What a good sustainability team most needs today is not a copywriter but a traceable measurement infrastructure.

How it is measured

• Product level — life cycle assessment (LCA) and Environmental Product Declarations (EPD)
• Organisation level — GHG Protocol scopes or an ISO 14064-1 greenhouse gas inventory
• Reporting level — public disclosure under GRI, CSRD/ESRS or ISSB
• Assessment level — ESG ratings, CDP disclosures, supplier scorecards
• Target level — science-based reduction targets validated by SBTi

These five layers feed each other and are built from the bottom up. Without product data, the Scope 3 of an organisational inventory rests on estimates; a target built on a weak inventory becomes invalid as the data improves.

Where to start

The most common mistake is starting at the top: announcing a target first and trying to measure afterwards. The reverse works. Find where your largest impact sits with a rough calculation, improve the data behind that line, then set a target on something you can actually measure.