For diagnosing, I like building up a cumulative distribution function (CDF) plot. If you're collecting data either for percentiles or thresholds you likely have

For diagnosing, I like building up a cumulative distribution function (CDF) plot. If you're collecting data either for percentiles or thresholds you likely have the data already. If you're setting thresholds, it's a useful plot to judge how likely a given threshold might trigger an alarm.