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Which is the right chart

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Viewing 23 posts - 1 through 23 (of 23 total)
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  • March 6, 2007 at 8:12 am #46302

    Gadgil
    ★ 10 Years ★
    Member

    I want to plot incoming call volume (half hour intervals) on a control chart, what is the right control chart to use. Thank you.

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    March 6, 2007 at 3:24 pm #152790

    Tim K.
    ★ 10 Years ★
    Member

    Hi Vinayak – good question.  Have you done any reseach yet to get closer to a reasonable answer?  Have you narrowed down your choices? 

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    March 6, 2007 at 4:09 pm #152793

    Whitehurst
    ★ 10 Years ★
    Participant

    I chart

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    March 6, 2007 at 4:58 pm #152797

    Jim Shelor
    ★ 10 Years ★
    Participant

    An X chart will give you mean, standard deviation, and control limits if you want them.
    The question is, what are you trying to control?

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    March 6, 2007 at 5:12 pm #152802

    Vidyadhar
    ★ 10 Years ★
    Member

    Use an I & MR Chart.

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    March 6, 2007 at 5:29 pm #152804

    BritW
    ★ 10 Years ★
    Participant

    Not sure what a control chart will do for you in terms of olume only, but the individuals chart is the one to go with (I&MR).

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    March 6, 2007 at 5:49 pm #152806

    NpBB
    ★ 10 Years ★
    Participant

    Better watch out, someone like Darth is going to yell at you for asking others to do your homework.

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    March 6, 2007 at 9:31 pm #152815

    Ken Feldman
    ★ 10 Years ★
    Participant

    Thanks for the vote of confidence but, in this case, it isn’t a matter of doing homework. It is a matter of a poorly asked question from someone with little knowledge and no apparent desire to learn something on their own.

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    March 7, 2007 at 12:08 am #152821

    sigmond
    ★ 10 Years ★
    Member

    Good to see you back Darth! 

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    March 7, 2007 at 12:44 am #152822

    BB
    ★ 10 Years ★
    Participant

    Charting for charting’s sake is a waste of time.  What is the problem you are trying to solve ?

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    March 7, 2007 at 3:57 am #152827

    Ken Feldman
    ★ 10 Years ★
    Participant

    Sorry, my Dad passed away a few weeks ago and I have been busy dealing with those things one deals with under those circumstances.  Pretty well under control now so I am back, at least a little bit more.

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    March 7, 2007 at 4:46 am #152829

    Chris Seider
    ★ 20 Years ★
    Participant

    Darth,
    My condolences on your loss….

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    March 7, 2007 at 8:12 am #152831

    Allthingsidiot
    ★ 10 Years ★
    Participant

    Run-chart

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    March 7, 2007 at 8:16 am #152832

    Jikui
    ★ 10 Years ★
    Participant

    U chart or C chart for it maybe Poisson Distribution

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    March 7, 2007 at 9:10 am #152833

    Allthingsidiot
    ★ 10 Years ★
    Participant

    Thank You.Please  explain  why?regards

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    March 7, 2007 at 10:56 am #152837

    Whitehurst
    ★ 10 Years ★
    Participant

    Can you some explain what is the purpose of MR chart?
    I feel its a chart without any practical usage
    regards
    joe

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    March 7, 2007 at 10:57 am #152835

    Madhu
    ★ 10 Years ★
    Participant

    I-MR chart would be the right one.

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    March 7, 2007 at 12:25 pm #152840

    Mike Carnell
    ★ 20 Years ★
    Participant

    Darth,
    Sorry to hear about your father. Heart felt condolences from everyone here.
    Regards,
    Mike

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    March 7, 2007 at 1:26 pm #152841

    Craig
    ★ 10 Years ★
    Participant

    Have you characterized the variability yet? I would suggest a multi-vari analysis first. You need some basis for rational subgrouping.
    The hierarchy could go:
    Call center (1,2,…n)
    Week (1,2,…n)
    Shift (1,2,3)
    Hour (1,2,….8)
    I would have to understand you needs a little better to be sure about this, but it is not always the best idea to jump into control charting without proper characterization.
    Good Luck
    HACL
     

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    March 7, 2007 at 2:04 pm #152846

    Tierradentro
    ★ 10 Years ★
    Participant

    I agree with BB and HALC.
    You need to help us out a little and define your problem first.  If you are looking for variation that’s one thing.  I’m not sure a control chart is the right tool based upon the little information provided.

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    March 7, 2007 at 3:26 pm #152849

    Ken Feldman
    ★ 10 Years ★
    Participant

    Mike, thanks.  If you are in town, I am working from the house.  Give a call at your convenience.

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    March 7, 2007 at 6:16 pm #152867

    Adam
    ★ 10 Years ★
    Participant

    If you are measuring the number of incoming calls, that would be discrete data which means you would not use an i chart.  And since you are measuring occurances and cannot say that each occurance has an equal opportunity, I would go with a u chart.

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    March 8, 2007 at 5:59 pm #152932

    Heebeegeebee BB
    ★ 10 Years ★
    Participant

    D,
    I’m sorry for your loss…I hope you are doing ok.
     

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