SFS-EN ISO 4259-1:2017:en

Soveltamisala

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ISO 4259-1:2017 specifies the methodology for the design of an Interlaboratory Study (ILS) and calculation of precision estimates of a test method specified by the study. In particular, it defines the relevant statistical terms (Clause 3), the procedures to be adopted in the planning of ILS to determine the precision of a test method (Clause 4), and the method of calculating the precision from the results of such a study (Clauses 5 and 6).
The procedures in ISO 4259-1:2017 have been designed specifically for petroleum and petroleum related products, which are normally considered as homogeneous. However, the procedures described in ISO 4259-1:2017 can also be applied to other types of homogeneous products. Careful investigations are necessary before applying ISO 4259-1:2017 to products for which the assumption of homogeneity can be questioned.

Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.

Sisällysluettelo

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Stages in the planning of an interlaboratory study for the determination of the precision of a test method

4.1 General
4.2 Preparing a draft method of test
4.3 Planning a pilot study with at least two laboratories
4.4 Planning the ILS
4.5 Executing the ILS

5 Statistical treatment of ILS results

5.1 General recommendation
5.2 Pre-screen using GESD technique
5.3 Transformation of data and outlier tests
5.4 Rejection of complete data (from all laboratories) for a sample
5.5 Estimating missing or rejected values
5.6 Rejection test for outlying laboratories
5.7 Confirmation of selected transformation

6 Analysis of variance, calculation and expression of precision estimates

6.1 General
6.2 Analysis of variance
6.3 Expectation of mean squares and calculation of precision estimates
6.4 Expression of precision estimates of a method of test
6.5 Specification of scope for the test method

7 R/r ratio

Annex A Determination of number of samples required (normative)
Annex B Derivation of formula for estimating the number of laboratories and samples required to meet minimum 30 degrees of freedom (informative)
Annex C Notation and tests (normative)
Annex D Illustration of procedures using ILS results for Bromine Number and statistical tables (normative)
Annex E Types of dependence and corresponding transformations (normative)
Annex F Weighted linear regression analysis (normative)
Annex G Rules for rounding (normative)
Annex H GESD technique to simultaneously identify multiple outliers in a data set (normative)
Annex I Glossary (informative)

Bibliography

Näytä kaikki

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Stages in the planning of an interlaboratory study for the determination of the precision of a test method

4.1 General
4.2 Preparing a draft method of test
4.3 Planning a pilot study with at least two laboratories
4.4 Planning the ILS
4.5 Executing the ILS

5 Statistical treatment of ILS results

5.1 General recommendation
5.2 Pre-screen using GESD technique
5.3 Transformation of data and outlier tests
5.4 Rejection of complete data (from all laboratories) for a sample
5.5 Estimating missing or rejected values
5.6 Rejection test for outlying laboratories
5.7 Confirmation of selected transformation

6 Analysis of variance, calculation and expression of precision estimates

6.1 General
6.2 Analysis of variance
6.3 Expectation of mean squares and calculation of precision estimates
6.4 Expression of precision estimates of a method of test
6.5 Specification of scope for the test method

7 R/r ratio

Annex A Determination of number of samples required (normative)
Annex B Derivation of formula for estimating the number of laboratories and samples required to meet minimum 30 degrees of freedom (informative)
Annex C Notation and tests (normative)
Annex D Illustration of procedures using ILS results for Bromine Number and statistical tables (normative)
Annex E Types of dependence and corresponding transformations (normative)
Annex F Weighted linear regression analysis (normative)
Annex G Rules for rounding (normative)
Annex H GESD technique to simultaneously identify multiple outliers in a data set (normative)
Annex I Glossary (informative)

Bibliography

Tuoteryhmä(t)

75.080 Öljytuotteet, yleistä »

Sidokset

Velvoittavat viittaukset

ISO 5725-2:1994 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

Tekninen komitea

CEN/TC 19 Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin »

Vahvistuspäivä

15.12.2017

Julkaisupäivä

19.12.2017

Painos

1

Sivumäärä

80

Julkaisun kieli

englanti