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You should be aware of the following limitations if you're using the work breakdown structure in Project Operations. These limits apply to projects and tasks.
Project limitations
| Field | Limits |
|---|---|
| Maximum total tasks for a project | 3,000 |
| Maximum total duration for a project | 5,475 days* (15 years) |
| Maximum total resources for a project | 1000 |
| Maximum total links (successor only) for a project | 2000 |
| Maximum total custom fields for a project | 10 |
| Maximum checklist items per task | 20 |
Task limitations
| Field | Limits |
|---|---|
| Maximum hierarchy level | 10 levels |
| Maximum links (successor + predecessor) | 20 |
| Maximum duration of leaf task | 1,250 days* |
| Maximum duration of a summary task | 5,475 days* (15 years) |
| Maximum resources assigned to a task | 50 resources |
| Supported date range for a task | 1/1/2000 - 12/31/2149 |
Note
*Duration in days is calculated using an 8-hour workday. If the project's "Hours per Day" setting differs, the maximum task and project duration values will adjust accordingly.