BS-ISO-11843-4-2003.pdf
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1、BRITISH STANDARD BS ISO 11843-4:2003 Capability of detection Part 4: Methodology for comparing the minimum detectable value with a given value ICS 03.120.30; 17.020 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 25 14:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11843-4:2003 This B
2、ritish Standard was published under the authority of the Standards Policy and Strategy Committee on 21 November 2003 BSI 21 November 2003 ISBN 0 580 42956 3 National foreword This British Standard reproduces verbatim ISO 11843-4:2003 and implements it as the UK national standard. The UK participatio
3、n in its preparation was entrusted to Technical Committee SS/6, Precision of test methods, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publicat
4、ions referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necess
5、ary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interp
6、retation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 8, an inside bac
7、k cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 25 14:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference nu
8、mber ISO 11843-4:2003(E) OSI 3002 INTERNATIONAL STANDARD ISO 11843-4 First edition 2003-11-01 Capability of detection Part 4: Methodology for comparing the minimum detectable value with a given value Capacit de dtection Partie 4: Mthodologie de comparaison de la valeur minimale dtectable avec une va
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14、.o gro We bwww.is.o gro ii ISO 3002 Allr ihgtsser edevr BS ISO 118434:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 25 14:47:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS-34811 O4:(3002E) I SO 3002 All irhgts seredevr iii Foreword ISO (the International Organization for Standardization
15、) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be repr
16、esented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards ar
17、e drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internation
18、al Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 11843-4 was p
19、repared by Technical Committee ISO/TC 69, Applications of statistical methods, Subcommittee SC 6, Measurement methods and results. ISO 11843 consists of the following parts, under the general title Capability of detection: Part 1: Terms and definitions Part 2: Methodology in the linear calibration c
20、ase Part 3: Methodology for determination of the critical value for the response variable when no calibration data are used Part 4: Methodology for comparing the minimum detectable value with a given value BS ISO 118434:2003 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 25 14:47:14 GMT+00:00 2
21、006, Uncontrolled Copy, (c) BSI IS-34811 O4:(3002E) iv I SO 3002 All irhgts seredevr Introduction An ideal requirement for the capability of detection with respect to a selected state variable would be that the actual state of every observed system can be classified with certainty as either equal to
22、 or different from its basic state. However, due to systematic and random variations, this ideal requirement cannot be satisfied for the following reasons. a) In reality all reference states, including the basic state, are never known in absolute terms of the state variable. Hence, all states can on
23、ly be characterized correctly in terms of differences from the basic state, i.e. in terms of the net state variable. b) In order to prevent erroneous decisions, it is generally recommended to report differences from the basic state only, i.e. data in terms of the net state variable. NOTE In ISO Guid
24、e 30 and in ISO 11095, no distinction is made between the state variable and the net state variable. As a consequence, in those two documents reference states are without justification assumed to be known with respect to the state variable. c) Furthermore, the calibration and the processes of sampli
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