Benefit 
  
Identifies which developments, trends, possible upheavals, changes, innovations and alternatives can have a general influence on the system under investigation.
  
Allows the relationships between the elements to be better defined, supplemented and scrutinized.
  
Shows which of these variables play an active, reactive, critical or inert role in the network. 
  
Organizes events, trends or variables in advance, from which scenarios can be derived.