QualityAdvisorsponsored by PQ Systems 
Quality Assurance SPC statistical process control software for an organization’s continuous improvement program. 
PQ Systems
Free capability calculator
The Cpk Advisor is a page that allows you to enter data and then perform a free capability analysis. Cpk, Ppk, and other statistics are computed and presented in an easy to understand text summary.
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View an example capability analysis.
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What is a capability analysis?
A capability analysis is a series of calculations performed on a set of data. The analysis asks the question "how is my process performing compared to how it should be performing?" Cpk is one of the statistics that gets calculated. The higher the Cpk, the more capable your process is of performing as it should. In other words, the higher the Cpk, the more capable your process is of producing output within the specifications.