ISO 27566-3 Revision Checker
ISO/IEC DIS 27566-3stage 40.20ballot closes 4 December 2026planning date 14 September 2027

All 17 analysis units · Scope the comparison

P3-03

Choose the benchmark basis

Decide whether the comparison is against another system, against a published benchmark, against the provider's practice statement, or against all three. Name the basis in the report and keep the same basis for every object.

Group Scope the comparisonPublic source WG 5 N3928, clauses 4.1.3 and 4.2Evidence 3 items

What the unit asks

The working draft makes the practice statement the core benchmark: the analysis asks whether the service delivered the commitments the provider published. An external benchmark, such as the accuracy table in the same draft, answers a different question, and a peer comparison answers a third. Mixing them produces a ranking that cannot be explained.

What good practice looks like

State the basis in the brief. Where the practice statement is the basis, pin its version. Where a published threshold is the basis, cite the table and say whether it is a draft figure.

Evidence an assessor asks for

ArtefactWhy it matters
The benchmark basis statement, with the source and version of each reference.It tells the reader what the result is a comparison against.
The current practice statement for each object.It is the business layer against which the delivery is judged.
A note on any basis that changed during the comparison.A changed basis is a changed comparison.

What a good answer sounds like

A good answer to P3-03 names The benchmark basis statement, with the source and version of each reference., dates it, and says what it does not cover. A policy or a promise is not an answer. If P3-03 has no artefact, the row is not met and the absence is the finding.

Where comparisons commonly fail

  • The comparison is called independent but the basis is the supplier's own claims.
  • A draft threshold is presented as a published requirement.
  • The practice statement assessed is older than the service tested.

Questions to put to the supplier

  1. What is this result compared against?
  2. Is that reference a published requirement, a draft figure or a supplier promise?

How this is used in the kit

P3-03 becomes one row of the comparison register, with an owner, a status and the evidence named above. A status of met asks for the artefact and its date, and the free check uses the same row as an evidence question, so the page and the register share one vocabulary.

Source for this page

Retrieved 2026-10-21. P3-03 is our statement of WG 5 N3928, clauses 4.1.3 and 4.2; the DIS body is not public, so no DIS clause number is claimed.