# Cp

A measure of process capability, calculated as a ratio of tolerance or specification limits (upper limit – lower limit) divided by the process variation (6 standard deviations).

USL = Upper Specification Limit

LSL = Lower Specification Limit

= Standard deviation (short term, within subgroup)

Example:

If a coating process is sampled with USL = 0.10, and LSL = 0.05, and the standard deviation = 0.01, then the Cp is calculated as:

### Additional Resources

- Short-Term Exposure Limit– creativesafetysupply.com
- New OEE Calculator for Manufacturing Efficiency– blog.creativesafetysupply.com
- OSHA Steps Up Chemical Safety– safetyblognews.com
- A Guide to Improving your Parking Lot– realsafety.org
- Implementing Six Sigma– hiplogic.com
- How To Measure 5S Success– 5snews.com
- Six Sigma Principles– blog.5stoday.com