Individuals and Teams are aligned with two lines of accountability
- A project line
- A functional or operational line
A relationship between workstreams and projects in the matrix is a foundation for clearly identifying roles and responsibilities, managing expectations and establishing an effective project control reporting process

A workstream: The progressive completion of task completed by different groups within a company which are required to finish a single project
Workstream owner: Responsible for coordinating work with the value stream and works with the PM in overall planning.
- Providing Estimates
- Resource commitments
- Risk analysis
The workstream owner is responsible for making sure that the work assigned to their workstream is being accomplished and for regular reporting to the Project Manager.