The Who Does What When report has four main elements: the timescale , the resource names , the assignments, and the data area.
Timescale ” This area shows the time periods for the report. This is customizable using the dialogs shown in the "Selecting a Report Type" sidebar earlier in this chapter.
Resource Names ” Like the Usage views, this report shows the resource names first. Read across the report to see how much work is assigned to each resource for the given time period.
Assignments ” Indented beneath each resource is a list of task names. These represent the assignments for each of the resources. The sum of the assignment values for each assignment for a time period will equal the value in that period for the resource.
Data ” This report shows Work in the data area by default.
This area shows the time periods for the report. This is customizable using the dialogs shown in the "Selecting a Report Type" sidebar earlier in this chapter. 
Like the Usage views, this report shows the resource names first. Read across the report to see how much work is assigned to each resource for the given time period. 
Indented beneath each resource is a list of task names. These represent the assignments for each of the resources. The sum of the assignment values for each assignment for a time period will equal the value in that period for the resource. 
This report shows Work in the data area by default. 
