PQ Systems - Quality eLine
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Capable? Who needs capability analysis?

Quality Quiz: With a video!

Data in everyday life

Six Sigma and more

Bytes and pieces

FYI: Current releases

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Quality Gamebox


Quality Quiz:Professor Cleary
Another quiz from Professor Cleary

Justin Tyme, quality technician for National Dairy Products, represents the newest threat to colleagues Marsha Mallow’s and Maura Thesame’s reputation as statistical experts, especially since he has his eye on their job. He recognizes the limitations of their understanding, and feels quite smug about his own statistical prowess.

Throwing his control chart on Marsha’s desk, Justin asks for her evaluation of the data. Maura, looking over Marsha’s shoulder, sees that most of the X-bars () are close to the process average (), and nods her head when Marsha congratulates Justin for producing a stable process, with all data points in control.

Evaluating this chart for yourself, would you concur in Marsha’s analysis?

a) Yes. This is a straightforward chart, reflecting a stable process.

b) No. Justin is playing games with his chart.


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