What evidence do auditors commonly ask for on SR-13 Supplier Inventory?

Supplier inventory with the systems and components each supports; Criticality attached to each supplier; Update procedure on supplier change; Sub-tier supplier information where obtainable.

What is the most common gap auditors find on SR-13?

supplier list held by procurement with no link to systems

NIST SP 800-161 Rev 1 (supply chain) · C-SCRM Family: Supply Chain Risk Management

`SR-13` Supplier Inventory

A control new in this publication: maintains an inventory of suppliers so that exposure to any one of them can actually be answered.

Source: NIST SP 800-161 Rev 1 (supply chain), SR-13. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open NIST SP 800-161 Rev 1 (supply chain) in the compliance library.

artefacts

held by a system

at each review

hard

to go live

Vendor register / contract repository

where the evidence lives

teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

none for this control

periodic reviewEvidence produced at each review

none for this control

governing documentDocuments that govern the control

Supplier inventory with the systems and components each supports · Vendor register / contract repository
Criticality attached to each supplier · Vendor register / contract repository
Update procedure on supplier change · Vendor register / contract repository
Sub-tier supplier information where obtainable · Vendor register / contract repository

First move

No system holds this evidence for you: it is people and documents. Reminders and routing to the owner still save time. Put the document under version control with an owner and review date, and log each review as a record with reviewer and date.

Common gaps auditors find

supplier list held by procurement with no link to systems
sub-tier suppliers entirely unknown
inventory cannot answer which systems a given supplier touches

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

Build my evidence sheet

SR-12 Component Disposal