Nowadays the level of automation in manufacturing industries has been increased dramatically. Some examples of these automation progresses are in cellular manufacturing and robotic cells. A growing body of evidence suggests that, in a wide variety of industrial settings, material handling within a cell can be accomplished very efficiently by employing robots (see (Asfahl, 1992)). Among the interrelated issues to be considered in using robotic cells are their designs, the scheduling of robot moves, and the sequencing of parts to be produced.
