1、BSI Standards PublicationPD CEN/TR 16625:2013Flexible sheets forwaterproofing Statisticaldefinition of manufacturerslimiting value and declaredvalue (MLV and MDV) 95 %StatisticPD CEN/TR 16625:2013 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of CEN/TR16625:2013
2、.The UK participation in its preparation was entrusted to TechnicalCommittee B/546, Flexible sheets for waterproofing and watervapour control.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessar
3、yprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 82828 7ICS 91.100.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was pu
4、blished under the authority of theStandards Policy and Strategy Committee on 31 December 2013.Amendments issued since publicationDate Text affectedPD CEN/TR 16625:2013TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16625 December 2013 ICS 91.100.50 English Version Flexible sheets for w
5、aterproofing - Statistical definition of manufacturers limiting value and declared value (MLV and MDV) - 95 % Statistic Feuilles souples dtanchit - Dfinition statistique de la valeur limite annonce par le fabricant (VLF) et de la valeur dclare par le fabricant (VDF) - Statistique 95 % Abdichtungsbah
6、nen - Statistische Definition des Hersteller-Grenzwertes und des Hersteller-Nennwertes (MLV und MDV) - 95 %-Statistik This Technical Report was approved by CEN on 28 October 2013. It has been drawn up by the Technical Committee CEN/TC 254. CEN members are the national standards bodies of Austria, Be
7、lgium, 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, Swit
8、zerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nation
9、al Members. Ref. No. CEN/TR 16625:2013 EPD CEN/TR 16625:2013CEN/TR 16625:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Terms and definitions 4 3 Statistical principles 4 3.1 General 4 3.2 MLV/MDV defined by 95 % performance based confidence level 5 Bibliography 6 PD CEN/TR 16625:2013CEN/TR 16625:2
10、013 (E) 3 Foreword This document (CEN/TR 16625) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterproofing”, the secretariat of which is held by NEN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
11、and/or CENELEC shall not be held responsible for identifying any or all such patent rights. PD CEN/TR 16625:2013CEN/TR 16625:2013 (E) 4 1 Scope This Technical Report is a guideline for the statistic approach for the definition of MLV/MDV within the declaration of values according to the product stan
12、dards of CEN/TC 254 Flexible sheets for waterproofing (see Bibliography). Characteristics with classes (for example fire behaviour) or pass/fail criteria (for example UV exposure) are not covered by the statistical rules of this report. 2 Terms and definitions For the purposes of the document, the f
13、ollowing terms and definitions apply. NOTE Terms for statistics are common knowledge and are described in different standards (for example ISO 3534-1; ISO/IEC Guide 98-3; ISO/TR 13425). 2.1 manufacturers declared value (MDV)1)nominal value including a double sided specification according to the prod
14、uct standard for a given test method or property 2.2 manufacturers limiting value (MLV)1)nominal value including a single sided specification according to the product standard for a given test method or property Note 1 to entry: The MLV can be a minimum or a maximum value according to statements mad
15、e under product characteristics of the relevant product standard. 2.3 single value value of one test specimen as described within the test standard 2.4 test result result as defined in the test standard Note 1 to entry: The test result is described in the Clause Expression of results of the test sta
16、ndard and reported in the test report. 3 Statistical principles 3.1 General The declaration of the product performance as defined in the product data sheet should be based on statistical interpretation of the factory production control (FPC), the interpretation of the initial type testing (ITT) and
17、the precision of the test methods. For characteristics controlled by FPC tests, where indirect control applies, the statistics of the direct test method apply to the indirect test method including expanded uncertainty. 1) The MLV and MDV definitions are also defined in all product standards given in
18、 the Bibliography of this Technical Report. This Technical Report describes the agreed current position of CEN/TC 254. CEN/TC 254 plans to adjust the statistic definition given in the product standards in accordance with this Technical Report. PD CEN/TR 16625:2013CEN/TR 16625:2013 (E) 5 3.2 MLV/MDV
19、defined by 95 % performance based confidence level The sample shall be taken following the sampling procedure defined by specific product standards. This statistical approach has to be applied either for sampling at the site or within the factory. For a given test method or property used within the
20、factory production control (as defined in the specific product standard) the 95 % performance based confidence level of the test results (as defined in the test method, typically the mean of a set of single measurements) should be within the limits of the MLV/MDV declaration. The continuous characte
21、ristic as the base to calculate the distribution is the test result as defined in the test standard. The precision of the test method is the lowest possible range of the MDV declaration of the datasheet of the manufacturer. 50 % of the precision of the test method is the lowest possible difference b
22、etween the average of the measured values and the MLV single side declaration of the datasheet of the manufacturer. If there is not enough statistical data (less than 50 test results) available for a new product then the statistic of a similar product can be transferred. An outlier can be detected i
23、n accordance to ISO 5725-2 or in a simpler approach if the difference between this single value (the potential outlier) and the mean (as defined in the test method) is more than 4 times the standard deviation determined by the test results of the quality control. In this case the single value of one
24、 specimen is an outlier and this single value can be deleted. NOTE The 95 % confidence interval corresponds to 2 times “experimental standard deviation of the mean” as defined in 4.2 of ISO/IEC GUIDE 983. PD CEN/TR 16625:2013CEN/TR 16625:2013 (E) 6 Bibliography 1 EN 13416 Flexible sheets for waterpr
25、oofing - Bitumen, plastic and rubber sheets for roof waterproofing - Rules for sampling 2 EN 13707 Flexible sheets for waterproofing - Reinforced bitumen sheets for roof waterproofing - Definitions and characteristics 3 EN 13859-1 Flexible sheets for waterproofing - Definitions and characteristics o
26、f underlays - Part 1: Underlays for discontinuous roofing 4 EN 13859-2 Flexible sheets for waterproofing - Definitions and characteristics of underlays - Part 2: Underlays for walls 5 EN 13956 Flexible sheets for waterproofing - Plastic and rubber sheets for roof waterproofing - Definitions and char
27、acteristics 6 EN 13967 Flexible sheets for waterproofing - Plastic and rubber damp proof sheets including plastic and rubber basement tanking sheet - Definitions and characteristics 7 EN 13969 Flexible sheets for waterproofing - Bitumen damp proof sheets including bitumen basement tanking sheets - D
28、efinitions and characteristics 8 EN 13970 Flexible sheets for waterproofing - Bitumen water vapour control layers - Definitions and characteristics 9 EN 13984 Flexible sheets for waterproofing - Plastic and rubber vapour control layers - Definitions and characteristics 10 EN 14695 Flexible sheets fo
29、r waterproofing - Reinforced bitumen sheets for waterproofing of concrete bridge decks and other trafficked areas of concrete - Definitions and characteristics 11 EN 14909 Flexible sheets for waterproofing - Plastic and rubber damp proof courses - Definitions and characteristics 12 EN 14967 Flexible
30、 sheets for waterproofing - Bitumen damp proof courses - Definitions and characteristics 13 ISO/IEC GUIDE 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 14 ISO 3534-1, Statistics Vocabulary and symbols Part 1: General statistical terms
31、and terms used in probability 15 ISO/TR 13425, Guidelines for the selection of statistical methods in standardization and specification This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and serv
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