X-Bar Control Limits

Six Sigma – iSixSigma Forums Old Forums General X-Bar Control Limits

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
  • #45621


    if a process fails Test 5 and Test 6, if I want to Omit the Subgroups to re-calculate the Control Limits, then do I have to Delete/Omit all the contributing subgroups in Test 5 (the 3 Subgroups data points) and Test 6 (the 4 Subgroups Data Points)?? or the ONLY one of these data points(subgroups numbers), so if Test 5 fails at data points/subgroup numbers 4 and 14, then I have delete ONLY these points or the data points before it as well..???



    Many software packages make it easy to use too many detection rules, which produce excessive false alarms.  Stick to the basic rule 1.
    There is no need to recalculate limits, unless you have made a major change to the system.  Control limits are not absolutes – their aim is to gain insight into the process.

Viewing 2 posts - 1 through 2 (of 2 total)

The forum ‘General’ is closed to new topics and replies.