A Gantt chart is a type of project planning tool that can help you track the progress of your project. The Gantt chart is a popular planning tool used in business and management. It is used to plan and manage complex projects, such as building construction, manufacturing, software development, or scientific research. A Gantt chart has three main components: tasks, durations and start dates. The tasks are on the horizontal axis; the durations are on the vertical axis; and the start dates are on the diagonal line.