🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN ISO 4259-5:2024

BS EN ISO 4259-5:2024

$198.66

Petroleum and related products. Precision of measurement methods and results – Statistical assessment of agreement between two different measurement methods that claim to measure the same property

Published By Publication Date Number of Pages
BSI 2024 58
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This document specifies statistical methodology for assessing the expected agreement between two test methods that purport to measure the same property of a material, and for deciding if a simple linear bias correction can further improve the expected agreement. This document is applicable for analytical methods which measure quantitative properties of petroleum or petroleum products resulting from a multi-sample-multi-lab study (MSMLS). These types of studies include but are not limited to interlaboratory studies (ILS) meeting the requirements of ISO 4259-1 or equivalent, and proficiency testing programmes (PTP) meeting the requirements of ISO 4259-3 or equivalent. The methodology specified in this document establishes the limiting value for the difference between two results where each result is obtained by a different operator using different apparatus and two methods X and Y, respectively, on identical material. One of the methods (X or Y) has been appropriately bias-corrected to agree with the other in accordance with this practice. This limit is designated as the between-methods reproducibility. This value is expected to be exceeded with a probability of 5 % under the correct and normal operation of both test methods due to random variation. NOTE      Further conditions for application of this methodology are given in 5.1 and 5.2.

PDF Catalog

PDF Pages PDF Title
2 undefined
12 5.1 General requirements
13 5.2 Additional requirements for PTP data
5.2.1 General conditions
5.2.2 Test on existence of extreme samples
14 5.2.3 Test on distribution of lab results
15 5.2.4 Comparison of precision
5.3 Brief sequential steps of the procedure
17 5.4 Flow diagram of the procedure
19 6.1 Sample mean and standard error
6.1.1 General
6.1.2 Computation of the means
6.1.3 Calculation of standard errors
20 6.2 Suitability of the data
6.2.1 Test on property variation
6.2.2 Correlation of the test methods
21 6.3 Bias correction selection statistics
6.3.1 General
6.3.2 Class 0—No bias correction
6.3.3 Class 1a—Constant bias correction
22 6.3.4 Class 1b — Proportional bias correction
6.3.5 Class 2 — Proportional and constant bias correction
23 6.4 Selection of the appropriate bias correction class
24 6.5 Confirming the normal distribution of weighted residuals
25 6.6 Sample-specific biases

Related products

BS EN ISO 4259-5:2024
$198.66