# ISO 16820:2004 — Withdrawn and superseded ISO standards

For ISO 16820:2004, item title is Sensory analysis — Methodology — Sequential analysis; status code is 9599; successor is ISO 16820:2019; withdrawn / published date is 2004-06-23, recorded from its source on 2026-08-05.

- **Identifier:** ISO 16820:2004 _(verified: appears in the quote below)_
- **Item title:** Sensory analysis — Methodology — Sequential analysis _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 16820:2019
- **Withdrawn / published date:** 2004-06-23 _(verified: appears in the quote below)_

## What the source says

> 31085,IS,,ISO 16820:2004,Sensory analysis — Methodology — Sequential analysis,Analyse sensorielle — Méthodologie — Analyse séquentielle,2004-06-23,1,['67.240'],ISO/TC 34/SC 12,9599,,[76670],"['en','fr']",10,"<p>ISO 16820:2004 describes a procedure for statistically analysing data from forced-choice sensory discrimination tests, such as the Triangle, Duo-Trio, 3-AFC, 2-AFC, in which after every trial of the discrimination test the decision can be made to stop testing and declare a difference, to stop testing and declare no difference, or to continue testing.</p><p>The sequential method often allows for a decision to be made after fewer trials of the discrimination test than would be required

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).