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Defining PERT, CPM, and Gantt Relative to Project

            A PERT chart is fully known as a Program Evaluation Review Technique and is project management tool which is used for scheduling organizing and coordinating several tasks which are all part of a project. This methodology was developed in the 1950s by the American Navy who at the time was interested in managing the Polaris submarines missile programs. On the other hand, the Critical Path Method (CPM) was also developed at the same time as an algorithm for the management of projects in the private sector.

            Conversely, as a horizontal bar chart, the Gantt chart was developed in 1917 as a production control tool by Henry L. Gantt (an American social scientist and engineer). The Gantt chart is always used in project management since it provides very graphical illustrations of schedules. This helps in planning, coordinating and tracking particular tasks in a certain task.

The advantages

The PERT Chart

            The advantage of using a PERT chart is that it enables a project to be completed at the previously set time or even before the specified date. This is mainly due to the simplistic and systematic nature of the chart. The PERT Chart also incorporates the critical path activities which expedite the completion time. The chart also is integral to the activities which are resourceful to the critical path activities.  This quality allows the activity of storing and analyzing data in the PERT to start and end within the appointed times.

The Gantt Chart

            The Gant chart is known to give the clearest illustration o the status of a project. Automated Gantt charts also have the ability to store more information, with the information being comprehensive enough to indicate the individuals carrying out specific tasks, and necessary notes on the procedures on the task.  One may also adjust the Gantt chart to display the exact status of the task project, as frequently as possible.

            The CPM remains very advantageous, given that its expansive nature allows for the inclusion of relatable resources. The inclusion of these many related activities allow for resource leveling.

Demerits

The PERT Chart

            According to Pearlson (2006), one of the disadvantages of using the PERT chart is that its chronological estimation on the duration of activities is to a given extent subjective and ancillary to personal judgment. The presence of limited experience may leave the numbers being fed in the PERT chart being subjected only to guesses. This may lead to biasness.

            At the same time, from the time estimates, PERT assumes a beta distribution. Despite the fact that the activity times may be well estimated, the estimation of time may lead to differences in the actual distribution.

            Similarly, PERT makes the wrong assumption that the critical path is the same as the project completion’s probability distribution time. PERT charts continue to underestimate the estimated project completion time, despite the fact that other paths can become the critical path in the event of the relatable activities being delayed.

The Gant Chart

            One of the problems with the Gant chart is that it fails to show task dependencies. This makes it impossible to gauge the extent to which other tasks may be affected, as a result of one task being behind schedule.

The CPM Chart

            The failure to ensure precision when using the CPM and when calculating time may lead to a mistake. When such a mistake is made, the result of the analysis may totally become susceptible to change. This may eventually bring about an upset in the project implementation in the event of the estimates being blindly or inchoately constructed and the changes being addressed late.

Schedules for Each Major Task

            The CPM allows one to monitor the achievement of project goals by helping the reader to view the instance where remedial action needs exaction, so as to ensure that a given project remains on course. It is against this backdrop that the CPM is reputed for being important in identifying pending tasks which are very time sensitive.  For the Gantt chart, one may use a Microsoft Project such as the excel spreadsheet which is of medium complexity.

            When using the Gantt chart, it is imperative to pay keen attention to the dictates of the Critical Path Analysis. This will demand that one should not resort to another activity before the task at hand has been completed. This will need also that activities are completed in a sequential pattern. It is important that the data analyst and tabulator known how to differentiate the data at hand, dissimilar activities from the ones mentioned above. These activities are not dependent on the completion of other related tasks so that these tasks can be executed without regard to sequence. Thus, these dissimilar tasks are properly or specifically known as parallel tasks or non-dependent tasks.

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