Critical Path Method models the activities and events of a project as a network of activities depicted as nodes on the said network. Also, it shows lines which form the beginning and end of activities. The longest path in the network is shown as the critical path. Perhaps one of the characteristics of CPM is the activities of a routine nature with “minimal uncertainty in the project completion times.” (Operations: Critical path method, 2010). Before working out a CPM network Chart, it is first of all necessary to list out the chronological series of events that are involved in the changing of wheels and has been listed as follows: