Two axes that decide everything

Where the footprint concentrates

Where the supply chain is measurable

The deployment sequence the map implies

A read on which purchased-goods categories carry the footprint, which have measurable supply chains, and where an inventory-linked instrument lands first.

Every company reporting a Scope 3 inventory faces the same uncomfortable fact: the biggest number on the page is usually Category 1, purchased goods and services, and it is the number built on the weakest data. But ‘Category 1’ is not one thing. It is dozens of commodity supply chains with wildly different footprints and wildly different measurability.

This piece maps that terrain — where the emissions concentrate, where the supply chains are traceable enough to measure, and where the two overlap, because that overlap is where an inventory-linked instrument is actually deployable.

A purchased-goods category is addressable by an inventory-linked instrument only if it scores on two axes at once. The first is footprint concentration : how much of the emissions the category actually carries. The second is measurability : whether the supply chain is physical and traceable enough to attach primary data to a specific unit of commodity.

A category can score high on one and low on the other. A huge footprint in an untraceable, service-heavy supply chain is hard to address with a commodity instrument. A perfectly traceable commodity with a trivial footprint is not worth the machinery. The interesting territory is the top-right corner: large footprint and traceable supply chain.