Carlos:

Here's a link to another example.

http://processtrends.com/pg_charts_control_chart.htm

Kelly

http://processtrends.com


"John Mansfield" wrote in message
...
Jon Peltier has several examples on his site that should help:

http://peltiertech.com/Excel/Charts/RunChtLines.html

http://peltiertech.com/Excel/Charts/statscharts.html

--
John


"Carlos" wrote:

How can I design a Control Chart, i.e., for an Industrial production
statistical control, with its lower and upper limit lines (+ - 3 sigmas)?
Thanks very much.