CEN/TR 16797-2:2015
(Main)Construction products: Assessment of release of dangerous substances - Guidance on the statistical assessment of declared values - Part 2: Technical and statistical background
Construction products: Assessment of release of dangerous substances - Guidance on the statistical assessment of declared values - Part 2: Technical and statistical background
This Technical Report provides guidance on the statistical assessment of declared values with respect to the release, emission and/or content of dangerous substances. This report provides statistically-based criteria for type-testing (TT), further-testing (FT) and where a product has been shown to be consistent with measured values for the release, emission or content that are significantly below the declared values, the point where no-further-testing (NFT) is permitted.
A series of fundamental principles are defined in CEN/TR 16797-1 and two statistical approaches are defined. The first approach is to use assessment by variables and this approach requires the data to be normally or log-normally distributed. This approach is recommended as the default option. The alternative approach based on assessment by attributes is appropriate for data sets that are not normally or log-normally distributed. The downside to this form of assessment is that more test data are needed for the same level of reliability. CEN/TR 16797-1 introduces these assessment procedures and CEN/TR 16797-2 provides more detail and the statistical proof that they satisfy the principles defined in CEN/TR 16797-1. With both of these approaches the minimum frequency of testing is a function of the distance between the mean value and declared value and the variability of the data set, i.e. the sample standard deviation.
To reduce the costs of testing, production plants producing a similar product may share data, e.g. be grouping the product into clusters for statistical assessment of declared values. Rules for the use of clusters are given in this document.
This document also contains rules for identifying outliers within a data set and guidance on using tests other than the reference method for FT.
A list of tasks for product technical committees is given in this document as is a model clause for including in product standards and rules of applications that may be cited in the product standard or copied into product standards.
Produits de construction - Evaluation de l'émission de substances dangereuses - Guide pour l’évaluation de la performance et la vérification de sa constance - Partie 2 : Données techniques et statistiques
Gradbeni proizvodi – Ocenjevanje sproščanja nevarnih snovi - Navodilo za statistično ocenjevanje deklariranih vrednosti - 2. del: Tehnično in statistično ozadje
To tehnično poročilo CEN zagotavlja navodilo za statistično ocenjevanje deklariranih vrednosti v zvezi s sproščanjem, emisijami in/ali vsebnostjo nevarnih snovi. To poročilo zagotavlja merila na podlagi statističnih podatkov za tipsko preskušanje (TT), dodatno preskušanje (FT), kadar pa je dokazana skladnost proizvoda z izmerjenimi vrednostmi za sproščanje, emisije ali vsebnost, ki so bistveno nižje od deklariranih vrednosti, točko, ko ni dovoljeno dodatno preskušanje (NFT).
V dokumentu FprCEN/TR 16797-1 so opredeljeni sklop temeljnih načel in dva statistična pristopa. Prvi pristop zajema uporabo ocenjevanja s spremenljivkami, pri čemer je za ta pristop potrebna normalna ali logaritemsko normalna porazdelitev podatkov. Ta pristop se priporoča kot privzeta možnost. Alternativni pristop, ki temelji na ocenjevanju po atributih, je primeren za podatkovne sklope, ki niso normalno ali logaritemsko normalno porazdeljeni. Slaba plat te oblike ocenjevanja je, da je za enako raven zanesljivosti potrebnih več preskusnih podatkov. FprCEN/TR 16797-1 uvaja te postopke za ocenjevanje, FprCEN/TR 16797-2 pa zagotavlja več podrobnosti in statistični dokaz, da so izpolnjena načela iz dokumenta FprCEN/TR 16797-1. Pri obeh pristopih je najmanjša pogostost preskušanja funkcija razdalje med povprečno vrednostjo in deklarirano vrednostjo ter spremenljivosti podatkovnega sklopa, tj. standardni odklon vzorca.
Da bi se zmanjšali stroški preskušanja, si lahko proizvodni obrati, ki proizvajajo podoben proizvod, delijo podatke, npr. proizvod povežejo v skupine za statistično ocenjevanje deklariranih vrednosti. Pravila za uporabo skupin so določena v tem dokumentu.
Ta dokument vsebuje tudi pravila za opredelitev osamelcev v podatkovnem sklopu in navodilo za uporabo preskusov, ki niso referenčna metoda za dodatno preskušanje.
Seznam opravil za tehnične odbore za proizvode je naveden v tem dokumentu, pa tudi modelni člen, ki se vključi v standarde za proizvode, in pravila za uporabe, ki jih je mogoče citirati v standardu za proizvod ali kopirati v standarde za proizvode.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2015
*UDGEHQLSURL]YRGL±2FHQMHYDQMHVSURãþDQMDQHYDUQLKVQRYL1DYRGLOR]D
VWDWLVWLþQRRFHQMHYDQMHGHNODULUDQLKYUHGQRVWLGHO 7HKQLþQRLQVWDWLVWLþQR
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Construction products: Assessment of release of dangerous substances - Guidance on
the statistical assessment of declared values - Part 2: Technical and statistical
background
Produits de construction - Evaluation de l'émission de substances dangereuses - Guide
pour l’évaluation de la performance et la vérification de sa constance - Partie 2 :
Données techniques et statistiques
Ta slovenski standard je istoveten z: CEN/TR 16797-2:2015
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
91.100.01 Gradbeni materiali na Construction materials in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT
CEN/TR 16797-2
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
August 2015
ICS 03.120.20; 91.100.01
English Version
Construction products: Assessment of release of dangerous
substances - Guidance on the statistical assessment of declared
values - Part 2: Technical and statistical background
Produits de construction - Evaluation de l'émission de
substances dangereuses - Guide pour l'évaluation de la
performance et la vérification de sa constance - Partie 2 :
Données techniques et statistiques
This Technical Report was approved by CEN on 16 January 2015. It has been drawn up by the Technical Committee CEN/TC 351.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16797-2:2015 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
0 Introduction . 5
0.1 General . 5
0.2 Background . 5
0.3 Assessment of construction products . 6
0.4 Reading guide to CEN/TR 16797-2 . 9
0.4.1 General introduction . 9
0.4.2 Rules of application . 9
0.4.3 Statistical background . 9
0.4.4 Annexes . 9
1 Scope . 10
2 Terms, definitions, abbreviations and symbols . 10
2.1 Terms and definitions . 10
2.2 Abbreviations and symbols . 14
3 Context . 16
4 Quality level of performance with respect to the release, emission or content of
RDS . 17
5 Methods for statistical assessment of declared values for RDS . 17
5.1 Goal of the assessment . 17
5.2 Assessment of the production . 17
5.3 Assessment of clusters . 19
5.4 Assessment of no-further-testing . 20
5.5 Methods of assessment . 23
5.5.1 Introduction . 23
5.5.2 Assessment by variables . 23
5.5.3 Assessment by attributes . 24
5.6 Description of the assessment procedure . 24
5.6.1 Type testing . 24
5.6.2 Further-testing . 25
5.6.3 Clusters . 26
5.6.4 No-further-testing . 29
5.7 Banned substances . 29
6 Assessment by variables . 30
6.1 Single production units . 30
6.1.1 Type testing . 30
6.1.2 Further-testing . 31
6.1.3 Rule of application for products where the test values are significantly below the
declared value (Gamma rule) . 33
6.1.4 Rule of application for products where a small number of test results may be
expected . 33
6.2 Cluster of production units . 34
6.2.1 Type testing . 34
6.2.2 Further-testing . 36
6.2.3 Rule of application for cluster products where the test values are significantly
below the declared value (Gamma rule). 37
6.3 No-further-testing . 37
6.4 Handling values lower than the detection limit . 38
6.5 Identifying outliers . 38
6.6 Choosing a declared value . 39
7 Assessment by attributes . 40
7.1 Single production units . 40
7.1.1 Type testing . 40
7.1.2 Further-testing . 41
7.2 Cluster of production units . 42
7.2.1 Type testing . 42
7.2.2 Further-testing . 43
7.3 No-further-testing . 44
7.4 Handling values lower than the detection limit . 44
7.5 Identifying outliers . 44
7.6 Choosing a declared value . 45
8 Statistical principles of the rules of application . 45
8.1 Introduction . 45
8.2 Assessment of a production part . 45
8.3 Test error . 50
8.4 Assessment by variables . 51
8.4.1 Type testing and further-testing . 51
8.4.2 Test frequency for further-testing . 52
8.4.3 Gamma rule . 56
8.4.4 No-further-testing . 56
8.5 Assessment by attributes . 57
8.5.1 Type testing and further-testing . 57
8.5.2 No-further-testing . 59
8.6 Consumer’s and producer’s risk . 60
8.6.1 Acceptance and non-acceptance of batches that exceed the declared value . 60
8.6.2 Estimation of the consumer’s risk . 63
8.6.3 Practical approach . 64
9 Additional sampling requirements . 65
9.1 General . 65
9.2 Probabilistic sampling . 66
9.3 Judgemental sampling. 68
10 Indirect tests . 68
10.1 General . 68
10.2 Correlation .
...
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