anchor.diff:  | `Indeterminate` | _1_            | Light green / `#990` | No Severity could be associated with this event.
   |===
   
  -=== Calculation of the operational status
  +==== Calculation of the operational status
   
   The operational status of a _Business Service_ is correlated in two steps.
   First, the status of each contained element is mapped to the _Business Service_.
   For _Reduction Keys_ and _IP Services_ the status is based on their alarm status.
   For contained _Business Services_ the operational status is used.
   
  -==== Map Functions
  +===== Map Functions
   
   The mapping can be performed by one of _Map Functions_ listed below:
   
  
positive.code: | `Threshold`     | Uses the highest severity found more often than the given threshold.
  |===
  
  ==== Operational status changes
  
  If a _Business Service_ changes its operational status an _OpenNMS_ event of the type `uei.opennms.org/bsmd/serviceOperationalStatusChanged` is fired.
  The log message of the event contains the name of the _Business Service_.
  
negative.code: | `Ignore`   | Ignores the severity of the managed entity
  |===
  
  ===== Reduce Functions
  
  Finally, the list of mapped status values are then aggregated into the operational status of the _Business Service_.
  For this operation the following _Reduce Functions_ are available:
  