Reference number
ISO 16820:2019
© ISO 2025
International Standard
ISO 16820:2019
Sensory analysis — Methodology — Sequential analysis
Edition 2
2019-10
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Published (Edition 2, 2019)

ISO 16820:2019

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Format
CHF 65
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Abstract

This document specifies 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.

The sequential method often allows for a decision to be made after fewer trials of the discrimination test than would be required by conventional approaches that use predetermined numbers of assessments.

The method is effective for:

a) determining that either:

  1. a perceptible difference results; or
  2. a perceptible difference does not result when, for example, a change is made in ingredients, processing, packaging, handling or storage;

b) selecting, training and monitoring assessors.

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General information

  • Status
     : Published
    Publication date
     : 2019-10
    Stage
    : Close of review [90.60]
  • Edition
     : 2
    Number of pages
     : 10
  • Technical Committee :
    ISO/TC 34/SC 12
    ICS :
    67.240 
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