Outlier Detection
`````````````````
-Outlier evaluation of test result of value <X> follows the definition
+Outlier evaluation of test result of value *X* follows the definition
from previous section:
+----------------------------+----------------------+
trend metrics and detect anomalies, three simple evaluation formulas are
used:
-+-------------------------------------------+------------------+-------------+
-| Anomaly | Compliance | Evaluation |
-| Evaluation Formula | Confidence Level | Result |
-+===========================================+==================+=============+
-| (TMM - 3 * TMSD) <= X <= (TMM + 3 * TMSD) | 99.73% | Normal |
-+-------------------------------------------+------------------+-------------+
-| X < (TMM - 3 * TMSD) | Anomaly | Regression |
-+-------------------------------------------+------------------+-------------+
-| X > (TMM + 3 * TMSD) | Anomaly | Progression |
-+-------------------------------------------+------------------+-------------+
++-------------------------------------------+-----------------------------+-------------------+
+| Anomaly Evaluation Formula | Compliance Confidence Level | Evaluation Result |
++===========================================+=============================+===================+
+| (TMM - 3 * TMSD) <= X <= (TMM + 3 * TMSD) | 99.73% | Normal |
++-------------------------------------------+-----------------------------+-------------------+
+| X < (TMM - 3 * TMSD) | Anomaly | Regression |
++-------------------------------------------+-----------------------------+-------------------+
+| X > (TMM + 3 * TMSD) | Anomaly | Progression |
++-------------------------------------------+-----------------------------+-------------------+
TMM is used for the central trend reference point instead of TMA as it
is more robust to anomalies.
quarter except last week, max(TMM[(last - 3mths)..(last - 1week)]),
respectively. This results in following trend compliance calculations:
-+-------------------+----------------+-----------+------------------------------------------+
-| Trend | | | |
-| Compliance Metric | Change Formula | V(alue) | R(eference) |
-+===================+================+===========+==========================================+
-| Short-Term Change | ((V - R) / R) | TMM[last] | TMM[last - 1week] |
-+-------------------+----------------+-----------+------------------------------------------+
-| Long-Term Change | ((V - R) / R) | TMM[last] | max(TMM[(last - 3mths)..(last - 1week)]) |
-+-------------------+----------------+-----------+------------------------------------------+
++-------------------------+---------------------------------+-----------+------------------------------------------+
+| Trend Compliance Metric | Trend Change Formula | Value | Reference |
++=========================+=================================+===========+==========================================+
+| Short-Term Change | (Value - Reference) / Reference | TMM[last] | TMM[last - 1week] |
++-------------------------+---------------------------------+-----------+------------------------------------------+
+| Long-Term Change | (Value - Reference) / Reference | TMM[last] | max(TMM[(last - 3mths)..(last - 1week)]) |
++-------------------------+---------------------------------+-----------+------------------------------------------+
Trend Presentation
------------------