Gantt charts and PERT charts are useful tools for visualizing and communicating information about projects.
- Gantt charts present information in format of a bar chart. This presentation shows the percentage of work completed for each task.
- In Gantt charts, the focus is on percentage completion of each task, without demonstrating the link that two tasks may have to each other.
- Gantt charts present project tasks and time allocation as the only two pieces of data.
- Gantt charts are easier to change, as a task moves along and it comes closer to completion.
- PERT charts displays information as network model. It presents an initial node from which task branch out.
- It visualize the sequence of tasks, as you cannot start on the next activity/task until the preceding one is completed.
- PERT does not show the percentage completed, because it employs a network model. It is easy to see which tasks depend on each other.
- PERT charts includes project tasks and time allocation, display dependency.
- Tasks in PERT charts will have three representative time structures: optimistic, most likely, and pessimistic.