Gantt Chart

Definition: a Gantt Chart is a graphical overview and schedule of all activities, elements and dependencies of a project or program. It is a special type of horizontal bar chart that is very common in project management to represent the phases and activities of a project Work Breakdown Structure.
A GC is constructed with a horizontal axis representing the total time span of the project, broken down into increments (for example, days, weeks, or months) and a vertical axis representing the tasks that make up the project. Horizontal bars of varying lengths represent the sequences, timing, and time span for each task.

More on gantt charts. More on project planning: Front End Loading, PERT Chart.