l Many research studies have been carried out on this topic. l Problem of __ draw recently more and more attention of system analysis. l Attempts to resolve this dilemma have resulted in the development of l Many complex processes unfortunately, do not yield to this design proced ure and have, therefore, not yet been automated. l Most of the methods developed so far are deterministic and /or probabili stic in nature.

l Many research studies have been carried out on this topic. l Problem of __ draw recently more and more attention of system analysis. l Attempts to resolve this dilemma have resulted in the development of l Many complex processes unfortunately, do not yield to this design proced ure and have, therefore, not yet been automated. l Most of the methods developed so far are deterministic and /or probabili stic in nature.