I Mr Chart
I Mr Chart. Before you interpret the individual chart (I chart), examine the moving range chart (MR chart) to determine whether the process variation is in control. When you change an unstable process, you can't accurately assess the effect of the changes.
They are sensitive to distribution An I-MR chart can alert you to changes that reveal a problem you should address. The lesson describes how to create this control chart in both Microsoft Excel and using Minitab. Get Clarity On All Statistical Process Control (SPC) Tools With Practical Examples at https://vijaysabale.co/spctoolsHello Friends, All the conce.
Click on the QI Macros tab installed on Excel's menu and, select Control Charts (SPC) > Variable (XmR, XbarR/S), and then "I-MR-R chart".
If the MR chart is not in control, then the control limits on the I chart are not accurate.
Exercise files I-MR charts plot individual observations on one chart accompanied with another chart of the range of the individual observations - normally from each consecutive data point. Always look at Moving Range chart first. QI Macros will do the math and draw the charts for you and turn unstable points or conditions red.
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Richard Carsons
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