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Table 3

Comparison between traditional and corrected control limits for different values of DR (Cp,Obs = 1.22).

Traditional control limits (σp = σt) Corrected control limits (σp ≠ σt)

    DR = 2 DR = 4 DR = 9
CL 10.2452 10.2452 10.2452 10.2452
UCL 10.2572 10.2545 10.2565 10.2570
LCL 10.2332 10.2359 10.2339 10.2333
CLR 0.02085 0.0161 0.0196 0.0206
UCLR 0.0441 0.0341 0.0414 0.0435
LCLR 0 0 0 0

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