Outbreak-signal detection using three algorithms (Shewhart control charts, EWMA control charts and Holt-Winters exponential smoothing) combined using the scoring system and applied to real data.

<p>The top panel plots the Mastitis series for the year 2010. Detection scores for each algorithm are shown as vertical bars, stacked to give a final alarm score which scale is shown in the secondary axis. The gray rectangle is used to mark the limit in the secondary axis which corresponds to the reporting threshold – here 7. The bottom panel shows a similar graph for the BLV series.