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Pert_chart_colored.gif: Original uploader was Jeremykemp at en.wikipedia derivative work: Rehua ( talk ) This is a retouched picture , which means that it has been digitally altered from its original version.
PERT is not easy to scale down for smaller projects. The network charts tend to be large and unwieldy, requiring several pages to print and requiring specially-sized paper. The lack of a timeframe on most PERT/CPM charts makes it harder to show status, although colours can help, e.g., specific colour for completed nodes.
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
PERT chart for a project with five milestones (10 through 50) and six activities (A through F). The project has two critical paths: activities B and C, or A, D, and F – giving a minimum project time of 7 months with fast tracking. Activity E is sub-critical, and has a float of 1 month.
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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It's much less popular than PERT (Program Evaluation and Review Technique) or CPM (Critical Path Method) however, it allows some of those methods limitations to be addressed. 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
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.