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How to Create and Read an I-MR Control Chart copy copy

How to Create and
Read an I-MR Control Chart

When it comes to creating control charts, it's generally good to collect
data in subgroups, if possible. But sometimes gathering subgroups of
measurements isn't an option. Measurements may be too expensive.
Production volume may be too low. Products may have a long cycle time.

In many of those cases, you can use an I-MR chart. Like all control charts,
the I-MR chart has three main uses:

Monitoring the stability of a process. Even very stable processes have
some variation, and when you try to fix minor fluctuations in a process you can
actually cause instability. An I-MR chart can alert you to...

 

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