Projects are an optional layer above categories for teams that want utilization and workload split by initiative rather than by tool.
Use projects when
- You bill or plan by project and want "hours on Project X" without a timesheet.
- You want to see how load is spread across a roadmap.
How activity maps to a project
- By category (a category can belong to a project),
- by application or repository / folder pattern, or
- by a manual assignment for known work.
Projects are analytical, not a time-entry system — nobody has to start or stop anything.