Hand and Foot Modifier FA -F9 and T1 - T9. E1 - E4, FA - F9, TA - T9 Level II Modifier. E1-E4 Anatomic modifiers which are associated with the eyelid. FA, F1- F9 Anatomic modifiers which are associated with the fingers. TA, T1- T9 Anatomic modifiers which are associated with the toes.
X-bar and R Control Chart Issues and Resolution. X-bar and R control charts are used in quality control to identify when special cause or out-of-control conditions occur in time-series data so that timely corrective actions can be taken to resolve problems.
The larger the subgroup, the more sensitive the X-bar and S-charts will be to shifts, providing a rational subgroup can be formed. For more sensitivity to smaller process shifts, use an EWMA or Cusum chart. See also: Interpreting an X-Bar / Sigma Chart. Create X-Bar charts in Excel