Define tiers relative to the buyer
A tier label describes a position relative to a customer, not an intrinsic property of a company. The same firm can be a direct supplier in one chain and an upstream supplier in another. Start with your known counterparty and the product being purchased. Public research can help extend the map, but it cannot establish your private purchase allocation without supporting information.
ISO's public traceability abstract concerns identifying parties and locations in a material chain. That is useful context for deciding what information a tier map needs to preserve.
Use an evidence ladder
A named agreement establishes a disclosed commercial relationship within its stated scope. A facility-level route requires evidence identifying the actual operations. An allocation or flow estimate needs additional quantity and period information. Do not promote a relationship up this ladder simply because the visual map would otherwise have a gap.
Record aliases, subsidiaries and historical names so a supplier is not duplicated or incorrectly merged. If a company operates several plants, leave the destination unresolved until the source supports a specific site. This restraint makes the final map more useful, not less complete in appearance alone.
Illustrative tier-two finding
Your direct supplier names a group as an upstream partner. That group owns three processing plants. Connecting all three to the supplier would invent scope; choosing the nearest would invent precision. Retain the group-level finding, cite the statement and ask which operation and product are involved.
Match the link to its evidence
| Evidence | Permitted finding |
|---|---|
| Named companies | Company-level commercial relationship |
| Named producing and receiving sites | Supported physical route |
| Matched volume and period | Possible quantified flow, within stated scope |
Your review checklist
- Define tiers from the actual buyer and product.
- Retain the scope disclosed by the source.
- Do not infer a site from geography alone.
- Validate private purchase links with the supplier.
Investigate with Oreline
Oreline retains company and facility research together so your team can investigate upstream relationships without forcing every disclosure into a site-to-site route. Use the evidence to prepare the next precise supplier inquiry.
Follow the evidence through the supply chain.
Explore Oreline’s guided investigations. No account required.
Explore the sandbox →Frequently asked questions
Can a corporate agreement be useful without a named plant?
Yes. It identifies a relationship to investigate. Keep it at company level until facility evidence is available.
Does Oreline know our complete tier-two network?
No. Its researched external network supports investigation, while your actual customer-specific chain requires validation with your own records and suppliers.