MGT 3332 - Chapter 10
The variation of a sampling distribution is less than the variation of the underlying process distribution
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Tolerances represent the control limits we use on the charts.
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Process capability compares variability to the tolerances.
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Processes that are in control eliminate variations
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A c-chart is used to monitor the total number of defectives in the output of a process.
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A control chart of any type answers the question, "is my process in control?"
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A process that exhibits random variability would be judged to be out of control
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Attribute data are counted, variable data are measured.
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Attributes need to be measured, whereas variable data can be counted.
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Concluding that a process is out of control when it is not know is a Type I error.
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Control limits used on process control charts are specifications established by design or customers.
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If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.
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Process "capability" means the ability to produce at high throughout.
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A c-chart is used to monitor the number of defects per unit for process output.
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