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HBOK 1-012

Title A Distribution-Free Phase I Control Chart for Subgroup Scale
Author(s) L. Allison Jones-Farmer and Charles W. Champ
Source Journal of Quality Technology
Topic Performance Measurement

Data Analysis

Performance Improvement

Abstract A Phase I control chart that is distribution free is proposed for processes that are in control. The proposed method achieves in-control performance when used with both normal and nonnormal data and is sensitive to subgroup differences in process scale. Guidance is provided for combining this method with an existing distribution-free Phase I chart for studying process location.
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Reference Code 1-012

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