The Quality Library

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The Quality Library

The Quality Library contains authoritative articles about control charts, process capability studies, Six Sigma, gage R&R, and other quality topics.

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CONTROL CHARTS & LIMITS

Articles and frequently-asked questions about process control charts and control limits.

>	Which control chart should you use?
>	Multiple control limits: A long shot, or just a bad slice?
>	When should you recalculate limits?
>	Testing a theory about your data.
>	More ...

GAGE R&R

Articles and frequently-asked questions about gage calibration, gage R&R, and measurement systems analysis.

>	Gentlemen, start your gages: R&R and variability.
>	How do you conduct an R&R Study?
>	How do you interpret an R&R Study?
>	More ...

PROCESS CAPABILITY

Articles and frequently-asked questions about process capability and process performance indices.

>	Cpk or Ppk: Which should you use?
>	How can Cpk be good with data outside specification?
>	How do we determine process capability if the process isn't normal?
>	More ...

SIX SIGMA

Articles by David Schwinn and others about Six Sigma.

>	Six Sigma quality and six sigma capability: the inside story.
>	Deming and six sigma: Product Design Opportunities.
>	Getting Started.
>	More ....