Which is the right chart

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

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?

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).

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.

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

Darth,
My condolences on your loss….

U chart or C chart for it maybe Poisson Distribution

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

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

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.

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.