Most manual scheduling methods use Gantt or PERT charts (or both) as the primary means of displaying a schedule. Both are visual tools that make it easy to see the entire schedule for a project at a glance. A Gantt chart is basically a bar chart of activities along a linear time scale. It contains a list of discrete tasks, such as "Frame exterior walls," and horizontally graphed bars that represent the amount of time the task will take to complete. A PERT (Program Evaluation Review Technique) chart displays tasks as a series of interconnected boxes that form a graphic picture of the relationships between tasks. Computerized scheduling has several advantages over a manual system. Not only can you build a schedule