Project Portfolio Management (PPM) is the centralized management of the processes, methods, and technologies used by project managers and project management offices (PMOs) to analyze and collectively manage current or proposed projects based on numerous key characteristics. The objectives of PPM are to determine the optimal resource mix for delivery and to schedule activities to best achieve an organization’s operational and financial goals, while honouring constraints imposed by customers, strategic objectives, or external real-world factors. The International standard defines the framework of the Project Portfolio Management 
PPM provides program and project managers in large, program/project-driven organizations with the capabilities needed to manage the time, resources, skills, and budgets necessary to accomplish all interrelated tasks. It provides a framework for issue resolution and risk mitigation, as well as the centralized visibility to help planning and scheduling teams to identify the fastest, cheapest, or most suitable approach to deliver projects and programs. Portfolio Managers define Key Performance Indicators and the strategy for their portfolio .
It is the determination of whether (and how) a set of projects in the portfolio can be executed by a company with finite development resources in a specified time. Fundamental to pipeline management is the ability to align the decision-making process for estimating and selecting new capital investment projects with the strategic plan.