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PERT network chart for a seven-month project with five milestones (10 through 50) and six activities (A through F). The program evaluation and review technique ( PERT ) is a statistical tool used in project management , which was designed to analyze and represent the tasks involved in completing a given project .
PERT network chart for a seven-month project with five milestones (10 through 50) and six activities (A through F). X-Pert supports the full cycle of project management – through multi-level work breakdown structure creation, transition to multiple projects using critical path diagrams and Gantt chart presentation.
Although the activity-on-arrow diagram (PERT chart) is still used in a few places, it has generally been superseded by the activity-on-node diagram, where each activity is shown as a box or node and the arrows represent the logical relationships going from predecessor to successor as shown here in the "Activity-on-node diagram".
The main limitations of PERT or CPM that might be addressed by GERT are: there are no alternative paths - all activities have to be performed; there are no loops - it is not possible to repeat activity, next similar activity has to be added; there are no decisions in the diagram - no and, or, xor options which help to choose proper path
In probability and statistics, the PERT distributions are a family of continuous probability distributions defined by the minimum (a), most likely (b) and maximum (c) values that a variable can take. It is a transformation of the four-parameter beta distribution with an additional assumption that its expected value is
The program evaluation and review technique (PERT), was developed by the U.S. Navy Special Projects Office in conjunction with the Lockheed Corporation and Booz Allen Hamilton as part of the Polaris missile submarine program. [14] PERT and CPM are very similar in their approach but still present some differences. CPM is used for projects that ...
The Gantt chart: Still accepted as an important management tool today, the Gantt chart is a graphical format that is used for the planning, scheduling, and controlling of work, including recording the progress of a project and its stages. The chart has a modern variation, Program Evaluation and Review Technique (PERT).
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