Which of the following statement is NOT correct about PERT ? 

The correct answer is - Option 2

Key Points

• Option 2 is incorrect because in a PERT chart, ‘Nodes’ represent events or milestones, and ‘Arrows’ represent the activities or tasks.
  • Nodes (also called events) signify the start or end points of tasks.
  • Arrows (also called activities) depict the actual tasks or operations that move the project from one event to another.

Additional Information

• PERT (Program Evaluation and Review Technique)
  • Developed primarily for planning and scheduling large and complex projects.
  • Introduced by the United States Navy in the late 1950s.
  • It helps in identifying the critical path and potential delays in the project timeline.
• Time Estimates in PERT
  • PERT utilizes three-time estimates to account for uncertainty:
    • Optimistic Time (O): The minimum possible time required to accomplish a task.
    • Most Likely Time (M): The best estimate of the time required to accomplish a task, assuming everything proceeds as normal.
    • Pessimistic Time (P): The maximum possible time required to accomplish a task, assuming everything goes wrong.
  • These estimates help in calculating the expected time for each activity.
• History of PERT
  • PERT was developed during the period between 1950-1960.
  • It was used in the Polaris missile project by the United States Navy.
  • PERT has since been adopted in various industries for project management.