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1.What is Gantt Chart

A Gantt chart is a type of bar chart that illustrates a project schedule. Gantt charts illustrate the start and finish dates of the terminal elements and summary elements of a project. Terminal elements and summary elements comprise the work breakdown structure of the project.
( from Wikipedia)

2.How to make a Gantt Chart

There are several steps to established the chart.
1). List all the activities involved in the project. Including the title and the time(starting point and the finishing deadline)

2).Establish all relationship between the activities. Such as activity A depends on activity B, which means A can start up only after the completment of B.

3).Add the time point of the activity at the related node, which can express the startup time, finish time, and the time span.

4).Mark up the essential activity of the project.

5).Arrange the executive person of the related part.

6).Adjust the chart according to the assessment of the work.

Here is an example of Gantt Chart