What evidence do auditors commonly ask for on RS.AN-08 An incident's magnitude is estimated and validated?

Root cause analysis procedure; Five whys or similar method evidence; RCA report with contributing factors and lessons; Action plan from RCA with owners and due dates; Closure verification of RCA actions.

What is the most common gap auditors find on RS.AN-08?

RCA reduced to a single root cause

NIST CSF 2.0 · RS - Respond

`RS.AN-08` An incident's magnitude is estimated and validated

An incident's magnitude is estimated and validated

Source: NIST CSF 2.0, RS.AN-08. 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 CSF 2.0 in the compliance library.

artefacts

held by a system

at each review

hard

to go live

Document 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

Five whys or similar method evidence · Document repository
RCA report with contributing factors and lessons · Document repository

governing documentDocuments that govern the control

Root cause analysis procedure · Policy repository / GRC workspace
Action plan from RCA with owners and due dates · Policy repository / GRC workspace
Closure verification of RCA actions · Document 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

RCA reduced to a single root cause
Contributing factors omitted
Action plans without owners
Closure verification absent

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

RS.AN-07 Incident data and metadata are collected, and their integrity and provenance are preserved · RS.CO-02 Internal and external stakeholders are notified of incidents