The suggested solution was to divide the project into several thousand tasks, represent each task by an arrow, connect the arrows in proper sequence, estimate the duration of each task, and calculate the project duration and the degree of schedule criticality of each task.Īt about the same time, the EI DuPont de Nemours Company, an American chemical company, was experiencing delays in its plant turnarounds, a project to rearrange production facilities for different products. The US Navy’s Fleet Ballistic Missile (Polaris) Program was behind schedule and needed help resolving the problem. Using the critical path method to schedule projects began in the late 1950s, with two simultaneous, unrelated projects. This approach, referred to as the activity-on-node (AON) or precedence method, caught on rapidly and has supplanted the earlier activity-on-arrow (AOA) method in nearly all uses.” How the Critical Path Method Was Created Fondahl, a professor of construction management at Stanford University, proposed in a 1961 paper that each task be represented by a node – square, circle, or oval – and the nodes be tied together with lines or arrows representing the sequence between tasks. This approach persisted for a decade, when a different method, with the same results, became popular. Professor John W. “The original critical path method used arrows to represent tasks and tied them together by connecting their beginning and end at nodes, so that proper sequencing was developed. In fact, the original critical path method was done by hand. Bennett points out that critical path has come a long way.
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In addition to his books, he has written more than 50 professional papers and articles on topics ranging from construction management to network techniques for project scheduling.ĭr. He has also spent 29 years on the engineering faculty at the University of Alaska Fairbanks, teaching undergraduate and graduate courses in technical management, including project management and scheduling. He has applied critical path scheduling to a wide variety of projects since 1965. WorkApps Package your entire business program or project into a WorkApp in minutes.Digital asset management Manage and distribute assets, and see how they perform.Resource management Find the best project team and forecast resourcing needs.
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