# Capability

A measure of how well the process or product measurements are able to stay within the defined limits or specifications over the long term. Capability indices include Cp, Cpk, Cpm, Pp and Ppk.

The calculations use the standard deviation of the measurements compared to the specification limits. If the specifications or tolerance limits are wider than the process or product measurements, then it is deemed “capable”.

The difference in the capability indices are based upon calculations of the standard deviation, incorporation of the mean (average), and alignment of the mean to the target or nominal value.

Download the Process Capability Powerpoint course >>>

### Additional Resources

- Short-Term Exposure Limit– creativesafetysupply.com
- CpK Defined– blog.creativesafetysupply.com
- Implementing Six Sigma– hiplogic.com
- Design For Six Sigma (DFSS)– iecieeechallenge.org
- Eight Steps To Practical Problem Solving– kaizen-news.com
- Theory of Constraints: Part 3– lean-news.com
- Morale of the Story– jakegoeslean.com
- Ten Funny Safety Videos– creativesafetypublishing.com
- Six Sigma Principles– blog.5stoday.com