Six Sigma SPC - Statistical Process Control

Six Sigma SPC's Quality Control Dictionary and Glossary
2070 W. Washington St. #5 Springfield IL 62702  Ph: 217.698.0063
6 Sigma Statistical Process Control (SPC) Software for Windows 95/98/NT/2000/XP/ME

Home Search Capability Studies Links
Products

Click Here!

Services
Prices FAQ
About Support
Contact Quality Control Dictionary and Glossary Free Desktop 6 Sigma Calculator Forum
Quality Books Articles Free Online 6 Sigma Calculator Free Newsletter

USL - Upper Specification Limit

USL, (Upper Specification Limit), is the greatest amount in which a process or product is within the acceptable performance limits.

This limit may be close to 3 sigma higher than the nominal or expected mean of any process or product.

There is usually a LSL, (Lower Specification Limit) also. A lot of products will only have one limit. Either an upper or lower control limit. These are sometimes called 'One Sided Specs'. A Cp cannot be calculated for one sided specs.

 
 

Back to the Quality Control Dictionary and Glossary

Click Here!

Google
  Web www.sixsigmaspc.com

Copyright 2005 Six Sigma SPC / Jim Winings All Rights Reserved
Privacy Statement - Disclaimer - Copyright - Site Map

Last Updated: Wednesday, 07-Jun-06 21:46:53 PDT