SIST EN ISO 11136:2017/A1:2020

Sensory analysis - Methodology - General guidance for conducting hedonic tests with consumers in a controlled area - Amendment 1 (ISO 11136:2014/Amd 1:2020)

Sensorische Analyse - Methodologie - Allgemeiner Leitfaden für die Durchführung hedonischer Prüfungen (Verbrauchertests) in einem kontrollierten Umfeld - Änderung 1 (ISO 11136:2014/Amd 1:2020)

No scope available

Analyse sensorielle - Méthodologie - Lignes directrices générales pour la réalisation d'épreuves hédoniques effectuées avec des consommateurs dans un espace contrôlé - Amendement 1 (ISO 11136:2014/Amd 1:2020)

Senzorična analiza - Metodologija - Splošno navodilo za izvajanje hedoničnih preskusov s pomočjo potrošnikov v nadzorovanem območju - Dopolnilo A1 (ISO 11136:2014/Amd 1:2020)

General Information

• Status: Published
• Public Enquiry End Date: 19-Jun-2020
• Publication Date: 08-Oct-2020
• ICS: 67.240 - Sensory analysis
• Technical Committee: KŽP - Agricultural food products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 24-Sep-2020
• Due Date: 29-Nov-2020
• Completion Date: 09-Oct-2020
• Ref Project: EN ISO 11136:2017/A1:2020 - Sensory analysis - Methodology - General guidance for conducting hedonic tests with consumers in a controlled area - Amendment 1 (ISO 11136:2014/Amd 1:2020)

Relations

• Amends: SIST EN ISO 11136:2017 - Sensory analysis - Methodology - General guidance for conducting hedonic tests with consumers in a controlled area (ISO 11136:2014)
• Effective Date: 01-Nov-2020

Overview

EN ISO 11136:2017/A1:2020 is Amendment 1 to ISO 11136 (Sensory analysis - Methodology). It provides updated, normative guidance for conducting hedonic tests with consumers in a controlled area (consumer acceptability and preference testing). This European adoption (CEN) of ISO 11136:2014/Amd 1:2020 clarifies statistical procedures, sample‑size calculations and example workflows for preference, difference and non‑inferiority hedonic tests.

Key topics and technical requirements

• Test context: Hedonic (liking) and preference tests conducted in a controlled test area (laboratory or test booth setting).
• Hypothesis types: Guidance for bilateral (two‑sided) and unilateral (one‑sided) hypotheses, including difference and non‑inferiority formulations.
• Statistical procedures: Updated formulas and worked examples in Annexes F, G and H for:
  • Preference proportions (p), difference δ definitions and caution about alternate definitions of δ.
  • Sample‑size and power calculations (examples: n = 259 for p difference 0.20; unilateral case n = 211; larger examples up to n = 853).
  • Use of t‑statistics, pooled within‑product variance, and degrees of freedom for t‑tests.
  • Practical calculation notes showing Excel functions (T.INV.2T, T.INV, T.DIST) for critical t and cumulative probabilities.
• Worked examples: Step‑by‑step numerical examples for calculating t, β (type II error), and power - useful for planning and reporting.
• Reporting and interpretation: How to conclude on significant preference or non‑inferiority based on t vs. critical values and power considerations.

Practical applications

• Design and execution of consumer acceptability studies for food, beverage, personal care and other sensory products.
• Determining sample sizes and statistical power when comparing two products for preference or equivalence.
• Supporting product development decisions (reformulation, optimization) and substantiating marketing claims about consumer preference.
• Standardizing test procedures in sensory labs to produce reproducible, defensible results.

Who should use this standard

• Sensory scientists and sensory laboratories
• Product developers and R&D teams in food, beverage, cosmetics, household products
• Quality assurance specialists and statisticians supporting consumer testing
• Consultants and contract research organizations offering consumer hedonic tests

Related standards

• ISO 5495 (mentioned in the amendment) - preference test terminology and methods referenced for two‑product ranking/preference procedures.

EN ISO 11136:2017/A1:2020 is essential for practitioners who need robust, standardized methods for consumer hedonic testing with clear statistical guidance for planning, analysis and interpretation. Keywords: EN ISO 11136:2017/A1:2020, sensory analysis, hedonic tests, consumer testing, controlled area, sample size, statistical power, preference test.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2020
Senzorična analiza - Metodologija - Splošno navodilo za izvajanje hedoničnih
preskusov s pomočjo potrošnikov v nadzorovanem območju - Dopolnilo A1 (ISO
11136:2014/Amd 1:2020)
Sensory analysis - Methodology - General guidance for conducting hedonic tests with
consumers in a controlled area - Amendment 1 (ISO 11136:2014/Amd 1:2020)
Sensorische Analyse - Methodologie - Allgemeiner Leitfaden für die Durchführung
hedonischer Prüfungen (Verbrauchertests) in einem kontrollierten Umfeld - Änderung 1
(ISO 11136:2014/Amd 1:2020)
Analyse sensorielle - Méthodologie - Lignes directrices générales pour la réalisation
d'épreuves hédoniques effectuées avec des consommateurs dans un espace contrôlé -
Amendement 1 (ISO 11136:2014/Amd 1:2020)
Ta slovenski standard je istoveten z: EN ISO 11136:2017/A1:2020
ICS:
67.240 Senzorična analiza Sensory analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11136:2017/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 67.240
English Version
Sensory analysis - Methodology - General guidance for
conducting hedonic tests with consumers in a controlled
area - Amendment 1 (ISO 11136:2014/Amd 1:2020)
Analyse sensorielle - Méthodologie - Lignes directrices Sensorische Analyse - Methodologie - Allgemeiner
générales pour la réalisation d'épreuves hédoniques Leitfaden für die Durchführung hedonischer Prüfungen
effectuées avec des consommateurs dans un espace (Verbrauchertests) in einem kontrollierten Umfeld -
contrôlé - Amendement 1 (ISO 11136:2014/Amd Änderung 1 (ISO 11136:2014/Amd 1:2020)
1:2020)
This amendment A1 modifies the European Standard EN ISO 11136:2017; it was approved by CEN on 10 August 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11136:2017/A1:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 11136:2014/Amd 1:2020 has been prepared by Technical Committee ISO/TC 34 "Food
products” of the International Organization for Standardization (ISO) and has been taken over as
which is held by CCMC.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11136:2014/Amd 1:2020 has been approved by CEN as EN ISO 11136:2017/A1:2020
without any modification.
INTERNATIONAL ISO
STANDARD 11136
First edition
2014-12-01
AMENDMENT 1
2020-01
Sensory analysis — Methodology
— General guidance for conducting
hedonic tests with consumers in a
controlled area
AMENDMENT 1
Analyse sensorielle — Méthodologie — Lignes directrices générales
pour la réalisation d'épreuves hédoniques effectuées avec des
consommateurs dans un espace contrôlé
AMENDEMENT 1
Reference number
ISO 11136:2014/Amd.1:2020(E)
©
ISO 2020
ISO 11136:2014/Amd.1:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 11136:2014/Amd.1:2020(E)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
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different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 12,
Sensory analysis.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 11136:2014/Amd.1:2020(E)
Sensory analysis — Methodology — General guidance for
conducting hedonic tests with consumers in a controlled
area
AMENDMENT 1
Annex F, F.2, NOTE 2
Replace the note with the following:
NOTE 2 In this document, the value of δ is equal to the difference between the preference proportions of the
two samples (e.g. if p = 0,60 and p = 0,40, then δ = 0,60 – 0,40 = 0,20). Some authors express the value of δ
a b
as the magnitude of the difference between the observed preference proportion and the preference proportion
assumed in the null hypothesis (e.g. p = 0,60, p = 0,40 and p = 0,50, then δ = |0,60 – 0,50| = |0,40 – 0,50| = 0,10).
a b 0
The reader is expected to be careful not to confuse the two ways of defining δ.

Annex F, F.2, EXAMPLE
Replace the example with the following:
EXAMPLE For the following conditions:
p δ p α u β Power u
0 a α/2 β
0,5 0,2 0,6 0,05 1,960 0,1 0,90 1,282
Formula (F.1) leads to n = 258,6, i.e. 259 consumers.
If the laboratory questions 259 consumers and there is a difference in proportion of prefe
...