If you are feeling it tough then I think you should start with simple topics like PERT, CPM, Transportation, assignment, network analysis etc. solve as many problems on this & ones you feel confidence on these topics then you can go for difficult ones.
If you are feeling it tough then I think you should start with simple topics like PERT, CPM, Transportation, assignment, network analysis etc. solve as many problems on this & ones you feel confidence on these topics then you can go for difficult ones.