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alarm_analysis.reports.stalealarms:stale_alarms

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alarm_analysis.reports.stalealarms:stale_alarms [2020/11/03 14:16] sualarm_analysis.reports.stalealarms:stale_alarms [2021/01/22 15:15] (current) – [Stale Alarm Detection] su
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-**Stale alarms** are alarms which are/were on for 24 hours or more and transitioned in the period selected.+====== Stale Alarms Report ====== 
 + 
 +**Definition:** Stale alarms are alarms which are/were on for 24 hours or more
 + 
 +{{ :alarm_analysis:stalealarmreport_01.png?direct&800 |}} 
 + 
 +The picture above shows an example Stale Alarm Report. 
 + 
 +By default, the report shows the Top 20 stale alarms (sorted by "Total On Time") for a defined reporting period (e.g. 1 Oct 2020 00:00:00 - 1 Nov 2020 00:00:00). 
 + 
 +The calculated metrics are: 
 + 
 +  * **Count:** Number of Stale Alarms / Total Number of Alarms, for reporting period.  
 +   
 +  * **Total on Time (days):**  The accumulated on-time of stale alarms. 
 + 
 +===== Stale Alarm Detection ===== 
 + 
 +Alarm Analysis operates on //Reporting Periods//. That is, Alarm Analysis compiles metrics for a given date-range and will only detect a Stale Alarm if it transitions (annunciates or returns) within the reporting period.  
 + 
 +{{ :alarm_analysis.reports.stalealarms:stale-alarms-vis.png?direct&600 |}} 
 +{{ :alarm_analysis.reports.stalealarms:stale-alarms-legend.png?direct&200 |}} 
 + 
 +With reference to the above illustration, the Stale Alarm report **includes** alarms that..
  
-The historical view of **stale alarms report** will show alarms that 
   * were on for 24 hours in the selected period (1).   * were on for 24 hours in the selected period (1).
   * transitioned after 24 hours (or more) in the selected period (2,3)   * transitioned after 24 hours (or more) in the selected period (2,3)
   * were on for longer than 24h but haven't returned to normal within the selected period (4).   * were on for longer than 24h but haven't returned to normal within the selected period (4).
-  * were on for longer than 24h but haven't started inside the selected period boundaries (5). 
  
-This can be visualised like so: +Example 5 has no associated Alarm, therefore no on-time can be calculated and is therefore omitted
-{{ :alarm_analysis.reports.stalealarms:stale-alarms-vis.png?direct&600 |}} + 
-{{ :alarm_analysis.reports.stalealarms:stale-alarms-legend.png?direct&200 |}}+Examples 6 and 7 transition outside the reporting period and are therefore **omitted** 
 + 
 + 
  
-Example 6 is part of **standing alarms** report and does **not** contribute to stale alarm report.  
-Example 7 is outwith selected period and won't contribute to stale alarm report. 
alarm_analysis.reports.stalealarms/stale_alarms.1604413019.txt.gz · Last modified: 2020/11/03 14:16 by su