Research Article

Process Monitoring with Multivariate -Control Chart

Table 1

ARL comparisons (example one).

ARL for chart with simultaneousARL for chart with exactARL for chart with nonsimultaneous
Šidák's approximation control limitsestimated control limitsapproximation control limits
ARL0ARL1ARL1ARL1ARL0ARL1ARL1ARL1ARL0ARL1ARL1ARL1
upperlowerupperlowerupperlower

5552.8551.0631.9593702.6101.0391.8242702.3771.0371.707
4171.9631.1181.5413702.1091.0731.5912861.7341.0771.406
5001.5181.2911.4053701.5831.1541.3692561.3921.1941.293
5551.4061.5051.4563701.4401.2311.3363031.3131.3471.330
5551.3111.9591.6353701.3441.4321.3883331.2391.6391.439