Although it is widely held that the Resource Allocation view is superior for finding and dealing with overallocations, this function may also be performed in the Gantt Chart view. Often the Gantt chart can be useful in seeing where overallocations are occurring in the wider context of your project, and where they sit on the critical path . In this case, the Resource Graph can be a useful view to place in the lower pane of a split-window view so you can easily see the level of allocation for each resource. The Resource Management toolbar plays a role in this scenario, as well.
Setting Up the View
Show the Resource Management toolbar by using the procedure in the "Showing and Using the Resource Management Toolbar" task.
Click on the Window, Split menu item.
Click anywhere in the lower pane of the window.
Click View, Resource Graph.
Finding Overallocations
Set up the view as shown in the "Setting Up the View" task.
Select the first task in the project.
Click the Find Next Overallocation button on the Resource Management toolbar to move the active selection to the next task that contains an overallocation.
View the level of overallocation in the resource graph.
If the task has more than one resource assigned to it, right-click and select Next Resource or Previous Resource to change the graph.
Show the Resource Management toolbar by using the procedure in the "Showing and Using the Resource Management Toolbar" task. 
Click on the Window, Split menu item. 
Click anywhere in the lower pane of the window. 
Click View, Resource Graph. 
If the task has more than one resource assigned to it, right-click and select Next Resource or Previous Resource to change the graph. 
