As the world is becoming more complex, the need for corporations to stay current with information increases.
Igor Ansoff suggested the following approach to understanding the monitoring of information during a search for the purpose of identifying (essentially weak) signals.
Information passes through three filters.
The first filter is called the Surveillance Filter.
In the search for information, collection is made by giving preference to information related to previously important issues, thus introducing a bias. Important information is thus lost.
The volume of information collected is usually unmanageable and has to be contracted. This is usually done based on the previous experience and knowledge of the information extractor. The relevance of this information is then filtered and information that does not appear relevant is discarded.
Allowing the information collected to be viewed by several people allows a better possibility for taking into account information that may appear to be initially irrelevant and may be the source of weak signals.