© 2004 Cayman Business
Systems
Rev:
Pre-G3 - Rendered Thursday,
February 12, 2004
Slide 136
Elsmar.com --- The
Cove!
8-Disciplines Problem Solving
Elsmar.com
Interpreting Control Charts
When Special causes of variation are affecting a process
and making it unstable and unreliable, the process
is said to be Out Of Control. Special causes of variation can be identified and eliminated thus improving the
capability of the process and quality of the
product. Generally, Special causes can be eliminated by action from someone directly connected with the process.
The following are some of the
more common Out Of
Control patterns:
A. Most points are near the center
line.
Upper Control Limit
Lower Control Limit
Average
Tool Wear?
Change To Machine Made
Tool Broke