The Outline Level field indicates the place of a task or assignment in the project outline hierarchy. The outline level is indicated by a number. The number of outline levels you can set is virtually unlimited.
There are several categories of Outline Level fields.
Data Type Integer (integer field: A type of field whose content is a whole number. Examples include the ID and Unique ID fields.)
Outline Level (task field)
Outline Level (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 Project assigns a value in the Outline Level field according to the assignment's outline level in the project outline hierarchy. A task with an outline level of 1 is at the highest level in the outline, that is, it has no summary tasks above it. A task with an outline level of 10, for example, has nine summary tasks above it. It might also have any number of subtasks below it.
Best Uses Add the Outline Level field to the sheet portion of the Task Usage or Resource Usage view when you want to display the position, or depth, of the assignment within the outline structure.
Example Sean is assigned to the "Write proposal" task, which is a subtask of the "Develop new accounts" summary task. If you add the Outline Level field to the Task Usage view, you will see that the "Develop new accounts" summary task has an outline level of 1. The "Write proposal" task has an outline level of 2. Sean's assignment row has an outline level of 3.