SIST-TP CEN/TR 17292:2019

SLOVENSKI STANDARD
01-april-2019
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Technical report regarding precision data for standards EN 12720, EN 12721, EN 12722,
EN 15185 and EN 15186
Technischer Bericht über Präzisionsdaten der Normen EN 12720, EN 12721, EN 12722,
EN 15185 und EN 15186
Rapport technique sur les données de fidélité concernant les normes EN 12720, EN
12721, EN 12722, EN 15185 et EN 15186
Ta slovenski standard je istoveten z: CEN/TR 17292:2018
ICS:
97.140 Pohištvo Furniture
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 17292
TECHNICAL REPORT
RAPPORT TECHNIQUE
November 2018
TECHNISCHER BERICHT
ICS 97.140
English Version
Technical report regarding precision data for standards
EN 12720, EN 12721, EN 12722, EN 15185 and EN 15186
Rapport technique sur les données de fidélité Technischer Bericht über Präzisionsdaten der Normen
concernant les normes EN 12720, EN 12721, EN EN 12720, EN 12721, EN 12722, EN 15185 und EN
12722, EN 15185 et EN 15186 15186

This Technical Report was approved by CEN on 5 November 2018. It has been drawn up by the Technical Committee CEN/TC
207.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17292:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General principles . 6
5 Repeatability standard deviation and reproducibility standard deviation . 7
5.1 Abrasion . 7
5.2 Scratching . 7
5.2.1 Lineal scratching . 7
5.2.2 Circular scratching . 7
5.3 Cold liquids . 8
5.4 Dry heat . 8
5.5 Wet heat . 8

European foreword
This document (CEN/TR 17292:2018) has been prepared by Technical Committee CEN/TC 207
“Furniture”, the secretariat of which is held by UNI.
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.
1 Scope
This document specifies repeatability standard deviation and reproducibility standard deviation for
results obtained from test methods carried out according to the following standards:
— EN 12720:2009+A1:2013, Furniture — Assessment of surface resistance to cold liquids,
— EN 12721:2009+A1:2013, Furniture — Assessment of surface resistance to wet heat,
— EN 12722:2009+A1:2013, Furniture — Assessment of surface resistance to dry heat,
— EN 15185:2011, Furniture — Assessment of the surface resistance to abrasion,
— EN 15186:2012, Furniture — Assessment of the surface resistance to scratching,
in order to provide the accuracy of results.
The above standards deal with all rigid furniture surfaces regardless of materials and they do not apply
to leather and textile surfaces.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results — Part 1:
1)
General principles and definitions
ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic
2)
method for the determination of repeatability and reproducibility of a standard measurement method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia. available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
precision
closeness of agreement between independent test results obtained under stipulated conditions
Note 1 to entry: Precision depends only on the distribution of random errors and does not relate to the true
value or the specified value.
1)This document is impacted by the corrigendum ISO 5725-1:1994/COR 1:1998, Accuracy (trueness and precision)
of measurement methods and results — Part 1: General principles and definitions Technical corrigendum 1.
2)This document is impacted by the corrigendum ISO 5725-2:1994/COR 1:2002, Accuracy (trueness and precision)
of measurement methods and results — Part 2: Basic method for the determination of repeatability and
reproducibility of a standard measurement method Technical corrigendum 1.
Note 2 to entry: The measure of precision is usually expressed in terms of imprecision and computed as a
standard deviation of the test results. Less precision is reflected by a larger standard deviation.
Note 3 to entry: “Independent test results” means results obtained in a manner not influenced by any previous
result on the same or similar test object. Quantitative measures of precision depend critically on the stipulated
conditions. Repeatability and reproducibility conditions are particular sets of extreme conditions.
3.2
accuracy
closeness of agreement between a test result and the accepted reference value
Note 1 to entry: The term accuracy, when applied to a set of test results, involves a combination of random
components and a common systematic error or bias component.
3.3
repeatability limit
r
value less than or equal t
...