01Identify what kind of statement you are reading

The numerical result still needs units and a sample basis. The identity conclusion needs a method and criterion. The appearance description does not become an identity test simply because it appears in the same table.

Some tests naturally produce categorical outcomes. Asking for an invented numerical identity score would not improve such a report. The useful request is for the basis of the stated conclusion and, where relevant, the supporting observation.

A blank cell, dash or “not applicable” is also different from “pass”. Do not fill in missing evidence by copying the conclusion from the row above.

02Find the rule that connects a result to a decision

ILAC G8 explains decision rules as the way measurement uncertainty is accounted for when stating conformity with a requirement. It distinguishes the specification limit from the acceptance limit used for measured results.ILAC G8 — Decision rules and statements of conformity (opens in a new tab)

For an original simplified example, a specification may permit at most 1.0% of a particular impurity. A procedure might apply simple acceptance at that boundary, or use a different documented acceptance boundary to manage decision risk. The report should not leave the reader to guess which approach produced “pass”.

The example is not a proposed peptide limit or an instruction to change a laboratory’s decision rule. It shows why a printed specification alone may not fully explain how a borderline result was classified.

03Recognise what a passing label leaves undisclosed

Suppose two hypothetical content measurements are 9.51 mg and 10.00 mg, both assessed against a simple inclusive interval of 9.50–10.50 mg. Both would receive the same passing label under that example rule, although they sit at different positions within the interval.

A pass-only table cannot show that difference. It may be sufficient for a narrow acceptance question while being insufficient for a comparison of content between lots or a trend over time.

Conversely, a number without a declared requirement is not a complete conformity decision. The reader may understand the amount yet still lack the intended acceptance basis. More decimal places do not supply that missing context.

Keep the result and the conclusion separate when taking notes. Record the actual value if supplied, the criterion, and the laboratory’s stated decision. This avoids turning a summary label into a fabricated measurement.

04Apply the conclusion only to the named attribute

An identity pass does not state the vial content. An assay pass does not establish sterility. A single “overall pass” needs an explanation of which assessed requirements contributed to it.

If a certificate combines measured results with an overall conclusion, read any qualifications and excluded tests. A summary cannot extend the work beyond what the document actually records.

A concise clarification is often enough: request the requirement and decision rule behind the label, or the numerical result if that is necessary for the intended comparison. Do not reinterpret an unexplained conclusion as either automatic failure or universal approval.