Information can originate internally from within the organization or externally as shown in fig. 1 above. Information can originate from formal and informal (grapevine) sources within the organization. The common problem associated with informal sources of information is questionable credibility. Menkus (1987) noted that wrong sources are possible causes of error in formation generation.
The formal sources are not free from error and should be checked to ascertain the accuracy and reliability of the information emanating from them. Hence, the information manager should filter the information created or received from internal or external sources either by formal or informal means-through repackaging.