Centralise & prioritise project requests to achieve business strategy
Project managers can submit new project requests based on business case. Portfolio managers have a central place to see all new project requests and looking at project benefits, cost, budget, resource, etc information, s/he can approve new project requests. Portfolio managers have an easy way to check project alignment with overall portfolio goals and objectives.
Essentially, portfolio manager can centralise intake of project demand, optimise project portfolio for resource capacity and overall strategic alignment.