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BS ISO 7870-8:2017

BS ISO 7870-8:2017

$167.15

Control charts – Charting techniques for short runs and small mixed batches

Published By Publication Date Number of Pages
BSI 2017 40
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This document describes ways of applying regular variables control charts to short runs and small mixed batches where the sample size for monitoring is restricted to one. It provides a set of tools to facilitate the understanding of sources of variation in such processes so that the processes can be better managed.

The charts described are process-focused rather than product-focused. The user can plot, monitor and control similar characteristics on different items, or different characteristics on an item, on a single control chart.

NOTE 1 The terms short run and small batch size are not well defined. Here, short run and small batch size are taken to mean only a few items are manufactured before a different item is then produced.

NOTE 2 For situations where the subgroup size is larger than one, other standards apply.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
10 4 How to select the correct type of Shewhart control chart for continuous variables data
4.1 General
4.2 How to select the correct type of Shewhart control chart for measured data generally
11 4.3 How to select the Shewhart control chart when the characteristic does not have a constant aim or process spread
13 5 How to prepare for short run, small mixed batch control charting
5.1 Focus on the process
5.2 Procedure for grouping similar processes
15 5.3 Typical applications
16 5.4 Preliminary process diagnosis
5.5 Procedure to establish the correct initial set-up of a process characteristic
5.5.1 Purpose
5.5.2 Scope and limitations
5.5.3 Reasons for need of procedure
17 5.5.4 Method
18 5.5.5 Example
19 5.6 Procedure to pre-establish control limits for SPC charts for short run, small batch, processes
5.6.1 Purpose
5.6.2 Scope of application
5.6.3 Reasons for need of procedure
5.6.4 Method
20 5.6.5 Example
23 6 How to establish and apply short run, small mixed batch, control charts
6.1 General
6.2 Variable aim, individual and moving range chart
6.2.1 Purpose
24 6.2.2 Scope of application
6.2.3 Method
6.2.4 Example
26 6.3 Variable aim, moving mean and moving range chart
6.3.1 Purpose
6.3.2 Scope of application
6.3.3 Method
27 6.3.4 Example
28 6.4 Universal, individual and moving range chart
6.4.1 Purpose
6.4.2 Scope of application
6.4.3 Method
29 6.4.4 Example
30 6.5 Universal, moving mean and moving range chart
6.5.1 Purpose
31 6.5.2 Scope of application
6.5.3 Method
32 6.5.4 Example
33 Annex A (informative) Reproducible copies of control charts forms and normal probability worksheet
39 Bibliography

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BS ISO 7870-8:2017
$167.15