Chapter 10

Chapter 10 - Other Univariate Statistical...

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Other Univariate Statistical Process-Monitoring and Control Techniques Chapter 10 Montgomery, 6th Edition
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Outline Statistical Process Control for Short Production Runs. Modified and Acceptance control Charts Control Charts for Multiple Stream Processes
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Outline
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Statistical Process Control for Short Production Runs.
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Introduction Most of the Short Production Control (SPC) methods are straightforward adaptations of the standard concepts and require no new methodology. One of the basic techniques of control charting used in the short-run environment is the use of the deviation from the nominal dimension as the variable on the control chart.
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Simplest technique: Deviation from normal* (DNOM) control Chart This is instead of using the measured variable control chart. Short Production Runs * or deviation from nominal.
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Example
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When using deviation from nominal as the variable on the chart, it is not necessary to have a long production run for each part number. Recommendation: 20 samples before calculating the charts. Control limits were calculated using data from all 10 samples.
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Important Highlights of DNOM
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Outline
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Attributes Control Charts for Short Production Runs Easy… Use a standardized control chart for the attribute of interest.
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Chapter 10 - Other Univariate Statistical...

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