Resource Usage ViewThe Resource Usage View shows the availability of resources
based upon the tasks they've been assigned to.  They layout is
similar to the Gantt chart, but this one is organized by resource.
The summary line shows the availability of the resource.  The
availability for each resource can be rolled up so that only the
summary line is displayed by clicking on the triangle next to the
resource name.
The detail shows each task that the resource is assigned to
and the time that the task is scheduled for is represented by a bar
in the chart.  Overallocations are shown up as red in the summary
bar, and its easy to see where the task allocations line up to
create the overallocation.
Color coding is as follows:
Green shows that the resource is not
allocated to any task at that timeBlue has a slightly different meaning
depending on its context.  On the task line, it shows that the
resource is either partially or fully allocated to the task (with
the allocation percentage displayed next to it), but on
the resource summary line, it shows that the resource is fully
allocated at that time.Grey shows that the resource is
partially allocated at that timeRed shows that the resource is
overallocated
