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I have a transactional service process that follows an exponential distribution with Lamda of 0.102. Couple of questions -

What is the best way to perform a capability analysis on the data? I've read about Ppk, and am not quite sure how to do this in excel, and interprete the results.

I'm running some pilots to see what changes reduce cycle time and variance the most. How do I compare baseline to pilot data?

I need to stick with individual data points, as we only average 4 transactions per day.

Thanks!

- I guess the mean = 1/y (lamda). The literature also said the standard deviation is 1/y. Is this correct? If I have an USL of 12, how would I calculate the process capability?

What is the best way to perform a capability analysis on the data? I've read about Ppk, and am not quite sure how to do this in excel, and interprete the results.

I'm running some pilots to see what changes reduce cycle time and variance the most. How do I compare baseline to pilot data?

I need to stick with individual data points, as we only average 4 transactions per day.

Thanks!

- I guess the mean = 1/y (lamda). The literature also said the standard deviation is 1/y. Is this correct? If I have an USL of 12, how would I calculate the process capability?

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