iSixSigma

Control Chart Questions

Six Sigma – iSixSigma Forums Old Forums Software/IT Control Chart Questions

Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • #26866

    reinaldo
    Participant

    Can I use control chart for all process variables to see changes or just for the main output? 

    0
    #65292

    ROSS
    Member

    Hi Reinaldo:
    I believe your question pertains to monitoring Key Process input variables that determine your Process Output. If this is the case, then I would monitor only those Key process Input Variables that significantly deterimine your Key process Output Variable. Typically, Multiple Regression Analysis or formal Design of Experiments are used to determine which process variables are Key.
    As to the Key Output variable, I would Control Chart this until I was satisfied that in controlling the identified Key Process Variables, my Key Output variable remains well behaved. Thereafter, you might want to revert to a periodic audit sample of the Output.
    Hope this is of some help!! Have a great day, Tony 
     
       
     

    0
    #65300

    Remi
    Participant

    Hai reinaldo,
    yes you can. But Tony already mentioned that if you do it on ‘unimportant’ parameters you are probably wasting time and resources.
    And of course check that you are using the right one (e.g. an Xbar-R chart on # rejects is not such a good idea in general).
    Remi

    0
Viewing 3 posts - 1 through 3 (of 3 total)

The forum ‘Software/IT’ is closed to new topics and replies.