X-bar & R Chart

Statistical Process Control (Variable Data, Subgroup n=5)
Recent Control Charts
ID Part No. Process / Machine Cpk Status Date Action
SPC-26-105 SHAFT-DIA-10 CNC Lathe #05 1.67 Stable 2026-02-04
SPC-26-102 PIN-LEN-50 Grinding #02 0.95 Unstable 2026-01-28
Subgroup Data (25 Groups)
No. Time Measurements (n=5)
X1X2X3X4X5
Process Control Status

Control Limits (A2=0.577, D4=2.114)

No Data
Process Mean ($\bar{\bar{X}}$)
0.000
UCL
0.00
LCL
0.00
Avg Range ($\bar{R}$)
0.000
UCL
0.00
LCL
0.00
Cpk
0.00
Target > 1.33
Out of Control Points
0
Requires Action
$\bar{X}$ Chart (Averages)
$R$ Chart (Ranges)