Journal of Quality and Reliability Engineering

Research Article

Process Monitoring with Multivariate -Control Chart

Table 2

ARL comparisons (example two).
ARL for chart with Šidák'sARL for chart with exactARL for chart with normal
approximation control limitsestimated control limitsapproximation control limits
ARL0ARL1ARL1ARL1ARL0ARL1ARL1ARL1ARL0ARL1ARL1ARL1
upperlowerupperlowerupperlower
4551.3651.0001.1833701.4281.000001.2142561.2711.0001.136
4551.1691.0011.0853701.1921.000201.0962561.1241.0001.062
4351.0761.0151.0463701.0851.003701.0442701.0561.0071.032
5261.0561.041.0483701.0651.010601.0383121.0371.0221.030
6251.0371.1151.0763701.0371.028381.0332941.0241.0701.047