Critical Path Method

803 WordsFeb 13, 20144 Pages
CRITICAL PATH METHOD (CEE 320 – VDC SEMINAR) 4 February 2009 Jesse Santiago & Desirae Magallon Overview Background & History CPM Defined The CPM approach Definitions Class Exercise Background & History Developed in the 1950s by the US Navy Originally, the critical path method considered only logical dependencies between terminal elements Since then, it has been expanded to allow for the inclusion of resources related to each activity, through processes called activity-based resource assignments and resource leveling. Critical Path Method for the construction industry Non-computer approach John Fondahl John Fondahl Stanford CE Professor Emeritus – 35 years Passed away last September 13th, 2008 US Marine Corps Sergeant in…show more content…
Critical activity – activity with zero float Resource leveling – iterative process of assigning crews to activities in order to calculate their duration Definitions Activity Identity box Early Start (ES) Early Finish (EF) Activity ID Late Start (LS) Late Finish (LF) Duration Class Exercise A STAR T C G H B D F Activity ID A B C D E F G H Duration 7 3 6 3 3 2 3 2 A B D,F B C E,G Dependency E Class Exercise 0 A 0 7 7 7 7 7 C 6 13 13 13 13 G 3 16 16 H 16 0 B 7 3 10 10 3 3 D 3 13 13 6 6 E 3 16 9 2 18 18 16 3 F 11 5 2 13 Class Exercise Gantt Chart Summary Critical Path Analysis is an effective and powerful method of assessing: Tasks which must be carried out Where parallel activity can be carried out The shortest time in which a project can be completed Resources needed to achieve a project The sequence of activities, scheduling, and timings involved Task priorities References Fondahl, John W., “Non-Computer Approach to the Critical Path Method for the Construction Industry”, Report #9, Stanford University, 1961 Fondahl, John W. “The History of Modern Project Management – Precedence Diagramming Methods: Origins and Early Development”. Project Management Journal. Volume XVIII. No. 2. June 1987. Hendrickson, Chris & Au, Tung, Project Management for Construction, Prentice Hall, 1989 Weber, Sandra C., Scheduling Construction
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