The Outline_Level field is used to specify the nesting of the task, which says at what level in the project the task is placed. A value of 1 indicates that the task is at the top level of the project. A larger outline level can only be specified if the previous outline levels are included. For example, to specify a task at level 3, it must be preceded by a level 1 task and a level 2 task in the import file. Additionally, all of the tasks for a project must be listed together in the CSV file. If Task 3 for Project 1 must be specified below Task 1 and Task 2 for Project 1, but before Task 1 for Project 2.

Note: This value should be the whole number greater than 0.