The Assignment fields indicate whether the row is an assignment row, rather than a task or resource row.
There are several categories of Assignment fields. Learn more about field categories.
Data Type Yes/No (Yes/No field: A type of field with content set to either Yes or No; also known as a Boolean field or a True/False field. For example, the Recurring field indicates whether the task is a recurring task.)
Assignment (task field)
Assignment (resource field)
Assignment (assignment field)
Entry Type Calculated (calculated field: A field in which the value is determined by Project based on information in other fields. Project may recalculate the value automatically or when you specify, depending on your choice of calculation settings.)
How Calculated If the row is an assignment row, the Assignment field contains Yes. If not, the Assignment field contains No. The Assignment field for assignments always contains Yes.
Best Uses The Task Usage and Resource Usage views display assignment rows. In the Task Usage view, the assignment rows indicate which resources are assigned to the task. In the Resource Usage view, the assignment rows indicate which tasks are assigned to the resource. Add the Assignment field to the sheet portion of the Task Usage or Resource Usage view when you want to display whether the row is an assignment row. Filter for the Assignment field when you want to see only assignment rows (Assignment = Yes), or when you want to exclude assignment rows (Assignment = No).
Example In the Task Usage view, you want to see only assignment rows for assignments that have more than 80 hours of work. In the Filter Definition dialog box, you filter for all Assignment fields equal to Yes together with Work fields that have values greater than 80 hours.