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!
one of the most useful charts that we can use is called the IMR chart, and IMR stands for Individuals Moving Range chart. They are particularly useful when an individual patient or an item moves through a system just one item at a time, and one of the first problems I see with the use of control charts is that staff often pick the wrong type of control chart and apply it to their data. If you go to our blog, and that’s surgicalbusinessmodelinnovation.com, you will see some charts that will help you get to grips on this and select the proper type of control chart for your data. (Click beneath for the blog entry and to find a link to the control chart selection tool.)