Responsibility · Impact and materiality · Component

Value-chain boundary

How far upstream and downstream the impact assessment reaches, and which parts of the value chain were left out, with reasons.

The deliverable

What it is

Much of an organisation’s impact sits outside its own walls — in the supply chain that makes its inputs and in the use and disposal of what it sells. The boundary states how much of that the assessment covers.

Every boundary leaves something out. The discipline is to make the exclusions explicit and reasoned, so that a reader can tell a deliberate scope decision from an oversight.

One level in

What it is made of

Each element is a constituent part of the component. Follow one to see the attributes it carries.

  1. Upstream reach

    Which tiers of suppliers and which raw materials are covered, and how good the available data is at each tier.

    3 attributes: Tiers covered · Data basis · Exclusions

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  2. Downstream reach

    Whether the use, maintenance and end-of-life of what the organisation sells are inside the assessment, and on what assumptions.

    3 attributes: Stages covered · Use assumptions · Exclusions

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Write down what was excluded and why. An unstated boundary will be read as the widest one the reader can imagine.