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### Control Limits for Individual Charts

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Control limits for all Individual Charts (the XMR(2), XMR(3), and RX Charts) are calculated using the formulas below:

XMR(2) Chart | XMR(3) Chart | RX Chart
`IXUCL = barx + 2.660bar(MR)` | `IXUCL = barx + 1.772bar(MR)` | `IXUCL = barx + 2.660bar(PR)`
`IXLCL = barx - 2.660bar(MR)` | `IXLCL = barx - 1.772bar(MR)` | `IXLCL = barx - 2.660bar(PR)`
`IRUCL = 3.267bar(MR)` | `IRUCL = 2.574bar(MR)` | `IRUCL = 3.267bar(PR)`
`IRUCL = 0.0 | `IRLCL = 0.0` | `IRLCL = 0.0`

For all Individual Charts, the process standard deviation is:

`sigma = bar(MR)/(d2)` or `sigma = bar(PR)/(d2)`