The mode is the value that occurs most often in a set of observations. The CAPABILITY procedure counts repetitions of the actual values (or the rounded values, if you specify the ROUND= option). If a tie occurs for the most frequent value, the procedure reports the lowest mode in the table labeled Basic Statistical Measures. To list all possible modes, specify the MODES option in the PROC CAPABILITY statement. When no repetitions occur in the data, the procedure does not report the mode. The WEIGHT statement has no effect on the mode.