Another possibility is based on the iterative or multistep nature of the process of
locating and retrieving knowledge documents using a KM system. The first results
are partly filtered by the capabilities of the system and further refined by the users of
the system based on their evaluation of quality [69]. In the absence of a credible
rating scheme, evaluation of quality becomes nontrivial. Even if the rating scheme is
not perfect, users may be inclined to accept the system with its “flaws” and the knowledge
content in spite of indifferent quality levels. This further explains the noneffect
of these factors on perceived usefulness and in turn on knowledge use.