Anomaly Detection for Monitoring
anomaly-detection-monitoring
anomaly-detection-monitoring
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Perhaps, instead of differencing, we should try an alternative: multiple<br />
exponential smoothing on the original metric. This should cope<br />
well with the trend and avoid trans<strong>for</strong>ming the metric as differencing<br />
does.<br />
Figure 5-2. Histogram of residuals from the exponential smoothing<br />
control chart on the raw data.<br />
Now it’s easy to see throughput drops when the metric falls below<br />
the lower control line. It’s much easier to interpret, visually at least.<br />
Multiple exponential smoothing is a little more complicated, but<br />
produces much better results in this example. It has a trend compo‐<br />
A Worked Example | 51