The Task Usage view lists for each task the resources assigned to it and the amount of work that each resource has performed over time, whether per day, week, month, or other time increment.
The sheet portion of the Task Usage view displays tasks with the resources indented underneath the task to which they are assigned. By default, the information displayed in the sheet portion is more oriented toward the task (work, duration, start, and finish). The timephased portion of the view is more oriented toward the resources, displaying information about work effort per resource or cost per resource. However, you can customize the Task Usage view to display a variety of information about the tasks (by applying a different table).
Best uses Use the Task Usage view to:
- View task and resource information together, such as work, start and finish dates, cost, work allocation, and work availability.
- View task assignments more evenly across resources.
- Find out how many hours each resource is scheduled to work on particular tasks.
- View the amount of work a person spends on a task by setting work contours.
Customization To make the Task Usage view fit your needs exactly, you can customize it or create a new version. When you close your project, the customized view is lose. To customize the Task Usage view, you can:
- Display different task information.
- Change the units of time that are displayed to view your project at the level of detail you need.
- View usage information for a specific time period.
- Create a combination view to display additional information about the tasks shown in the Task Usage view or about the resources to which those tasks are assigned .
Tables The Task Usage view displays categories of information about the tasks, arranged in tables. The default table for the Task Usage view is Usage, but you can select any of the task tables to display information about the project's tasks and associated resources.
Filters The Task Usage view can use any of the task filters to display only the tasks you want to see. When you select a filter, both the sheet and timescale portions of the Task Usage view display the information as defined by that filter's criteria. The default filter is the All Tasks filter.
Sorting You can apply different sort criteria to the tasks and assignments from the Task Usage view.
Grouping  The Task Usage view allows you to group tasks.
Zoom in and out 
The timeline units for the right portion of the Task Usage view are displayed at the top of the chart. By default, displays two units of time. You can adjust these time units to display up to three units of time, and you can change it so that different time units are displayed. For example, you can zoom out to get a bigger picture of your project's tasks by displaying Years and Months, or you can zoom in to see the exact start and finish dates for your project's tasks by changing the timescale to Weeks and Days.
Additionally you can choose a custom value for the zoom level.
 This is supported only in Project Viewer for Win PC/Server, Project Viewer for Win Web/Server, Project Viewer Online Subscription, Project Viewer for SharePoint Server, Project Viewer for SharePoint Online, Project Plan 365 for Win PC/Server, products
 This option is available only in Project Viewer for Win PC/Server, Project Viewer for MAC, Project Viewer for Win Web/Server, Project Viewer Online Subscription, Project Viewer for SharePoint Server, Project Viewer for SharePoint Online, Project Plan 365 for Win PC/Server, Project Plan 365 for MAC, Project Plan 365 for Win Web/Server, Project Plan 365 Online Subscription, Project Plan 365 for SharePoint Server and Project Plan 365 for SharePoint Online products