
The different roles involved in professional project management can be divided into two groups:

- Demand Management : People who propose projects and are interested in their monitoring.
- Supply Management : The people who use material and human resources to execute projects.
This distinction, taken from the business supply chain , is useful for understanding how different actors collaborate throughout the project life cycle.
Firstly, all those involved have the common objective of optimizing available resources, assigning them to the most priority projects.
Secondly, the different roles in project management, even if they are positioned in demand management or supply management, must collaborate throughout the life cycle.

Between demand management and operations management is project management . Projects can be divided into sequential phases, and in each phase a series of processes can be followed from inception to closure. In predictive projects (the requirements are clear to a high degree from the beginning), a lot of importance is given to planning. In adaptive, or agile, projects , detailed requirements are gradually deduced, continually collaborating with certain stakeholders.
We can consider 11 different roles when collaborating in professional project management:
Demand Manager Roles
Stakeholder (SH-) : The project’s stakeholders (Stakeholders) are the people who can affect, be affected or perceive themselves as affected by a decision, activity or result of the project. Stakeholders position themselves on the demand management side because they need to monitor performance, to ensure that their expectations are met.




Supply Manager Roles
Portfolio Manager (PfM-) : Portfolio Managers are the people assigned by the executing organization to authorize, balance, monitor and control the components of the portfolios. A portfolio is a group of projects, programs and operations, managed as a group (often to evolve a solution ) to achieve strategic objectives. Portfolio managers are positioned on the supply management side because they are responsible for executing strategic plans and accountable for achieving strategic objectives.


