One stage in the manufacture of semiconductor chips applies an insulator on the chips. This process must
Question:
(a) Do the data meet the sample size condition if we look at samples taken each day?
(b) Group the data by days and generate X-bar and S-charts with control limits at ± 3 SE. Is the process under control?
(c) Describe the nature of the problem found in the control charts. Is the problem an isolated incident (which might be just a chance event), or does there appear to be a more systematic failure?
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Related Book For
Statistics For Business Decision Making And Analysis
ISBN: 9780321890269
2nd Edition
Authors: Robert Stine, Dean Foster
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