ANALYSIS / SUBGROUPS
X-bar / R & Multi-Cavity Analysis
Enter one time-ordered subgroup per line, with measurements separated by commas. Use rational subgroups of 2–10 for X-bar/R. For multi-cavity analysis, each column represents a cavity measured at successive times.
Data & settings
Report information
Analysis results
X-bar/R control limits use published A2, D3, D4 constants (subgroup sizes 2–10). The multi-cavity mode treats each cavity as a separate sequential Individuals stream. Do not combine cavity readings as if they were consecutive observations of one process. Control-limit violations do not alone establish process capability.