![]() Time Management: A PERT chart assigns optimistic, most likely and pessimistic time estimates to activities.Visualization of Project Activities: Project managers and stakeholders get a visual representation of the project’s flow, making it easier to identify critical activities and potential bottlenecks.Using a PERT chart might look appealing, but it has pros and cons, depending on your business needs. In a team, predecessor activities must be done before another task begins, while successor activities can only start after an activity is completed.Īdvantages and Disadvantages of PERT Charts Predecessor and Successor Relationships: refer to dependencies between activities symbolized by arrows connected to the nodes.Pessimistic time estimate (P): the maximum time to complete an activity under the worst-case scenario. ![]() Most likely time estimate (M): is the most realistic timeframe to complete an activity.Optimistic time estimate (O): the minimum time required to complete an activity under the best-case scenario.Lag time: the minimum time it takes for a task to follow another.Lead time: the amount of time you should take to complete a task without affecting subsequent tasks.Delays on the critical path will directly impact the project’s duration. A thick line or a different color represents it. Critical path: refers to the longest path through the network diagram.Float or Slack: refers to how long the team can delay a task without affecting the project’s completion time.An arrow is drawn from the predecessor activity to the successor activity, illustrating their logical relationship. Arrows: the direction of the arrow represents the flow and sequence of work.Circles or triangles usually represent them in a chart. Nodes: represent activities and tasks within a project.Let’s look at some of the most common elements of PERT. Its primary goal was to provide a structured approach to project planning, allowing organizations to make informed decisions based on probabilistic analysis. Navy developed PERT charts to coordinate complex defense projects such as the Polaris missile submarine program. At its core, PERT utilizes a network of diagrams to visually illustrate the sequence of activities in a project timeline and project milestones.ĭuring the Cold War, the U.S. Program Evaluation and Review Technique (PERT) is a project management methodology that visually represents the time it takes to complete a project.
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