Rounding test for 1.55554 warn on high std dev do not compute alert if alert disabled do not compute danger if danger disabled warn on low std dev if variation limit is low Use multipliers from measurement, if they are set do not warn on std dev with defaults do not warn on high std dev if warning disabled warn about too few data points do not warn on low std dev if warning is disabled Standard computation of limits do no warn on high std dev if limit is high recompute compute danger if needed because alert too high even if danger disabled Rounding test for 10000.55556 reduce alert if > 80 % of danger warn on low std dev if variaton is low