It's very common that I hear about a team that has made a control chart with their data and said "Well, things look great!  Everything is in control!" About 8 of 10 times, things aren't ok at all!  Issues with control charts include:  

(A) concluding your process is in control...but (in fact) process is completely unacceptable (!)

(B) using a routine control chart with data that are non-normal

(C) selecting the wrong type of control chart

...and those are just three of the many ways controls charts can be misleading.  Whether you use an ImR chart, u chart, or another type of control chart, say hello to The Lab and let us help you today!