The Overallocation timephased (timephased: Task, resource, or assignment information that is distributed over time. You can review timephased information in any available time period in the fields on the right side of the Task Usage and Resource Usage views.) field contains the amount of work (work: For tasks, the total labor required to complete a task. For assignments, the amount of work to which a resource is assigned. For resources, the total amount of work to which a resource is assigned for all tasks. Work is different from task duration.) that is overallocated for all assigned resources on a task, the total amount of work that a resource is overallocated on all assigned tasks, or the amount of work that a resource is overallocated on an assignment. These timephased fields show values distributed over time.
There are several categories of Overallocation fields.
Data Type Duration (duration field: A type of field whose content is expressed as a duration of time. Examples include the Work, Duration, and Delay fields. A duration field includes the duration unit, such as hour, day, or week.)
Overallocation (task-timephased field)
Overallocation (resource-timephased field)
Overallocation (assignment-timephased field)