Which method is used to shorten project duration?

The method used to shorten project duration is crashing, which involves adding additional resources to critical path tasks to complete them faster. This can often mean increasing manpower, working overtime, or acquiring extra equipment to expedite the process. Crashing is particularly effective because it directly targets the activities that are on the critical path, thereby reducing the overall project timeline without altering the project scope.

While other methods like resource leveling help in balancing resources over time or float calculation helps in understanding how much time can be delayed, they do not specifically aim to shorten the duration of a project. Sequencing helps establish the order of tasks but does not address the timeline directly. In contrast, crashing focuses on accelerating task completion, making it the most appropriate method for reducing project duration.