Page 7 - OPERATIONS RESEARCH
P. 7

iv.Now, since B follows D and precedes E, the complete network drawing is shown below:




















               Evidently, this network contains a cycle is shown below:




                   b.  Revised network when D is a predecessor of F is as follows:



















                   c.  Revised  network  when D is a  predecessor  of F and B is a  predecessor  of D  is  given

                       below:
   2   3   4   5   6   7   8   9   10   11   12