September 2024
Intermediate to advanced
386 pages
12h 2m
English
Content preview from Statistical Process Control and Data Analytics, 8th Edition
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8 Process control by attributes
Objectives
- To introduce the underlying concepts behind using attribute data.
- To distinguish between the various types of attribute data.
- To describe in detail the use of control charts for attributes: np-, p-, c- and u-charts.
- To examine the use of attribute data analysis methods in non-manufacturing situations.
8.1 Underlying concepts
The quality of many products and services is dependent upon characteristics that cannot be measured as variables. These are called attributes and may be counted, having been judged simply as either present or absent, conforming or non-conforming, acceptable or defective. Such properties as bubbles of air in a windscreen, the general appearance ...
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