![]() Task Relationship: the relationships and dependencies between the tasks show when each task is due to begin and end.Ī Logic Network indicates the sequence of activities in a project over time.Key Milestone: completion of a key phase or stage.Estimated Time: the amount of time in days, weeks or months we expect a task or activity to take.Event Group: a logical grouping of tasks that form a single-phase or stage.In the diagram below, we see these elements: One of the Gantt charts first uses happened on America's Hoover Dam project started in 1931. ![]() They provide an excellent visual display of the entire project. They are an essential project management tool used for showing the phases, tasks, milestones and resources needed as part of a project. ![]() Since their first introduction, Gantt charts have become an industry standard. Since then, tracking time and interdependencies between tasks have become common and is now in everyday use. When first developed by Henry Gantt in 1917, the Gantt chart did not show the relationships between tasks. ![]() Gantt ChartĪ Gantt chart is a well-known and commonly used project management bar chart that tracks tasks across time. What follows is a short definition for each. A Gantt chart, Logic Network, PERT chart, Product Breakdown Structure and Work Breakdown Structure are standard tools used in project planning.
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