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BS ISO 22514-7:2021

BS ISO 22514-7:2021

$198.66

Statistical methods in process management. Capability and performance – Capability of measurement processes

Published By Publication Date Number of Pages
BSI 2021 62
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This document defines a procedure to validate measuring systems and a measurement process in order to state whether a given measurement process can satisfy the requirements for a specific measurement task with a recommendation of acceptance criteria. The acceptance criteria are defined as a capability figure (CMS, CMP) or a capability ratio (QMS, QMP).

NOTE

This document follows the approach taken in ISO/IEC Guide 98-3 (GUM), and establishes a basic, simplified procedure for stating and combining uncertainty components used to estimate a capability index for an actual measurement process.

This document is primarily developed to be used for simple one-dimensional measurement processes, where it is known that the method uncertainty and the specification uncertainty are small compared to the implementation uncertainty. It can also be used in similar cases, where measurements are used to estimate process capability or process performance. It is not suitable for complex geometrical measurement processes, such as surface texture and position measurements that rely on several measurement points or simultaneous measurements in several directions.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
14 4 Symbols and abbreviated terms
4.1 Symbols
17 4.2 Abbreviated terms
5 Basic principles
5.1 General
20 5.2 Resolution
5.3 Maximum permissible error known and used
5.3.1 General
5.3.2 MPE, maximum permissible deviation of the measuring system — uMPE
21 5.4 Capability and performance limits for a measuring system and measurement process
6 Implementation
6.1 General
6.2 Factors that influence the measurement process
6.2.1 General
22 6.2.2 Uncertainty components that belong to the measuring system
24 6.2.3 Additional uncertainty components belonging to the measurement process
27 7 Studies for calculating the uncertainty components
7.1 Measuring system
7.1.1 General
7.1.2 Repeatability and bias based on one reference standard
28 7.1.3 Standard uncertainty from the linearity deviation — uLIN
31 8 Calculation of combined uncertainty
8.1 General
33 8.2 Calculation of expanded uncertainty
34 9 Capability
9.1 Performance ratios
9.1.1 General
9.1.2 Performance ratio of the measuring system
9.1.3 Performance ratio of the measurement process
9.2 Capability indices
35 9.3 Capability of a measurement process with one-sided specifications
39 10 Capability of the measurement process compared to the capability of the production process
10.1 Relation between observed process capability and measurement capability ratios
40 10.2 Relation between observed process capability and measurement capability
41 11 Ongoing review of the measurement process stability
11.1 Ongoing review of the stability
42 12 Capability of attribute measurement processes
12.1 General
12.2 Capability calculations without using reference values
43 12.3 Capability calculations using reference values
12.3.1 Calculation of the uncertainty range
44 12.3.2 Symbols
45 12.3.3 Working steps for determining the uncertainty range
46 12.4 Ongoing review
48 Annex A (informative) Examples
54 Annex B (informative) Statistical methods used
59 Bibliography

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BS ISO 22514-7:2021
$198.66