Patterns in Control Charts

Patterns in Control - Charts Run of 5 above(or below central line Investigate for cause Figure S6.7 6 Process Capability þ The natural variation

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1 Patterns in Control Charts Normal behavior. Process is “in control.” Upper control limit Target Lower control limit Figure S6.7
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2 Upper control limit Target Lower control limit Patterns in Control Charts One plot out above (or below). Investigate for cause. Process is “out of control.” Figure S6.7
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3 Upper control limit Target Lower control limit Patterns in Control Charts Trends in either direction, 5 plots. Investigate for cause of progressive change. Figure S6.7
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4 Upper control limit Target Lower control limit Patterns in Control Charts Two plots very near lower (or upper) control. Investigate for cause. Figure S6.7
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5 Upper control limit Target Lower control limit Patterns in Control
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Unformatted text preview: Charts Run of 5 above (or below) central line. Investigate for cause. Figure S6.7 6 Process Capability þ The natural variation of a process should be small enough to produce products that meet the standards required þ A process in statistical control does not necessarily meet the design specifications þ Process capability is a measure of the relationship between the natural variation of the process and the design specifications Process Capability • Process variations limits • Design specifications limits • How do the limits relate to one another? 8 Natural Variation Versus Product Design Specifications...
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This note was uploaded on 01/20/2012 for the course MGT 3200 taught by Professor Moodie during the Spring '08 term at Kennesaw.

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Patterns in Control - Charts Run of 5 above(or below central line Investigate for cause Figure S6.7 6 Process Capability þ The natural variation

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