ISO 22514-3:2020
(Main)Statistical methods in process management — Capability and performance — Part 3: Machine performance studies for measured data on discrete parts
Statistical methods in process management — Capability and performance — Part 3: Machine performance studies for measured data on discrete parts
This document describes the steps for conducting short-term performance studies that are typically performed on machines (including devices, appliances, apparatuses) where parts produced consecutively under repeatability conditions are considered. The number of observations to be analysed vary according to the patterns the data produce, or if the runs (the rate at which items are produced) on the machine are low in quantity. The methods are not considered suitable where the sample size produced is less than 30 observations. Methods for handling the data and carrying out the calculations are described. In addition, machine performance indices and the actions required at the conclusion of a machine performance study are described. This document is not applicable when tool wear patterns are expected to be present during the duration of the study, nor if autocorrelation between observations is present. The situation where a machine has captured the data, sometimes thousands of data points collected in a minute, is not considered suitable for the application of this document.
Méthodes statistiques dans la gestion de processus — Aptitude et performance — Partie 3: Études de performance de machines pour des données mesurées sur des parties discrètes
Statistične metode za obvladovanje procesov - Sposobnost in delovanje - 3. del: Študije strojnega delovanja za izmerjene podatke na diskretnih delih
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Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST ISO 22514-3:2010
Statistične metode za obvladovanje procesov - Sposobnost in delovanje - 3. del:
Študije strojnega delovanja za izmerjene podatke na diskretnih delih
Statistical methods in process management - Capability and performance - Part 3:
Machine performance studies for measured data on discrete parts
Méthodes statistiques dans la gestion de processus - Aptitude et performance - Partie 3:
Études de performance de machines pour des données mesurées sur des parties
discrètes
Ta slovenski standard je istoveten z: ISO 22514-3:2020
ICS:
03.120.30 Uporaba statističnih metod Application of statistical
methods
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 22514-3
Second edition
2020-12
Statistical methods in process
management — Capability and
performance —
Part 3:
Machine performance studies for
measured data on discrete parts
Méthodes statistiques dans la gestion de processus — Aptitude et
performance —
Partie 3: Études de performance de machines pour des données
mesurées sur des parties discrètes
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Pre-conditions for application . 2
5.1 General . 2
5.2 Number of parts to be used in the study . 2
5.3 Materials to be used. 3
5.4 Measurement system. 3
5.5 Running the study . 3
5.6 Special circumstances . 3
6 Data collection . 3
6.1 Traceability of data . 3
6.2 Retention of specimens . 4
6.3 Data recording . 4
7 Analysis . 4
7.1 General . 4
7.2 Run chart . 4
7.2.1 Purpose . 4
7.2.2 Review the plot . 4
7.3 Analyse the pattern of the data . 5
7.3.1 Software approach . 5
7.3.2 Check the pattern of the data . 6
7.3.3 Summarize the data . 6
7.3.4 Manual approach . 6
7.4 Produce a probability plot . 9
7.4.1 General. 9
7.4.2 Analyse the data . 9
7.5 Special cases .10
7.5.1 Data indicate a skewed distribution .10
7.5.2 Bimodal data .11
7.5.3 Truncated data .12
7.5.4 Censored data .13
7.6 Calculation of machine performance indices .13
7.6.1 General procedure .13
7.6.2 Data following a normal distribution .14
8 Reporting .14
8.1 Test report .14
8.2 Confidence intervals .15
8.2.1 General.15
8.2.2 Indices calculated with the data following a normal distribution .15
8.2.3 Indices calculated with data following a non-normal distribution .16
9 Actions following a machine performance study .16
Annex A (informative) Tables and worksheets .17
Bibliography .19
Foreword
ISO (the International Organization for Standardization) 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 represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 69, Applications of statistical methods,
Subcommittee SC 4, Applications of statistical methods in product and process management.
This second edition cancels and replaces the first edition (ISO 22514-3:2008), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— updated and improved figures and computer outputs.
A list of all parts in the ISO 22514 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
Introduction
This document has been prepared to provide guidance in circumstances where a study is necessary
to determine if the output from a machine, for example, is acceptable according to some criteria. Such
circumstances are common in engineering when the purpose for the study is part of an acceptance
trial. These studies can also be used when diagnosis is required concerning a machine’s current level of
performance or as part of a problem-solving effort. The method is very versatile and has been applied
to many situations.
Machine performance studies of this type provide information about the behaviour of a machine under
very restricted conditions such as limiting, as far as possible, external sources
...
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