Astm D 4853 – 97 (Reapproved 2002) pdf free download

Standard Guide for
Reducing Test Variability1

This standard is issued under the fixed designation D 4853; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This guide serves as an aid to subcommittees’ writing
and maintaining test methods. It helps to (1) determine if it is
possible to reduce test variability, and, if so, (2) provide a
systematic approach to the reduction.

1.2 This guide includes the following topics:
Topic Title Section Number
Scope 1
Referenced Documents 2
Definitions 3
Significance and Use 4
Measures of Test Variability 5
Unnecessary Test Variability 6
Identifying Probable Causes of Test Variability 7
Determining the Causes of Test Variability 8
Averaging 9
Calibration 10
Keywords 11

1.3 The annexes include:
Topic Title Annex Number
Statistical Test Selection Annex A1
Frequency Distribution Identification Annex A2
Design of Ruggedness Tests Annex A3
Ruggedness Test Analysis:
Unknown or Undefined Distribution—Small
Sample
Annex A4
Unknown or Undefined Distribution—Large
Sample
Annex A5
Binomial Distribution Annex A6
Poisson Distribution Annex A7
Normal Distribution Annex A8
Design of a Randomized Block Experiment Annex A9
Randomized Block Experiment Analysis:
Unknown or Undefined Distribution—Small
Sample
Annex A10
Unknown or Undefined Distribution—Large
Sample
Annex A11
Binomial Distribution Annex A12
Poisson Distribution Annex A13
Normal Distribution Annex A14
Averaging:
No Compositing Annex A15
Compositing Annex A16

2. Referenced Documents

2.1 ASTM Standards:
D 123 Terminology Relating to Textiles2

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