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Zones and WE tests for non symmetric distribution

What inspired this wish list request?

when the control limits are user defined, and non symmetric (because of non symmetric distribution) the zone and the WE rules are based on symmetric gaussian distribution

What is the improvement you would like to see?

In case of non symmetric limits (non normal non symmetric distributions) the zones could be defined based on smoothing to adjust the distribution (as in process capability) and using probability and quantiles calculations to "copy" the Shewhart calculations, but it would be complex

Why is this idea important?

Because the zones, and the alarm rate is false

Quality and Process Engineering

Re: Zones and WE tests for non symmetric distribution - Status changed to: Yes, Stay Tuned!

Thanks for this suggestion @francois_berger.

This has been addressed, and can be tested in JMP 20 E1 (available late January or early February). It should also be in JMP 19.1, which is due out in March 2026.