Any kind of grouping of projects to enable the joint management of schedules and resources. Portfolios are tied to the organization's strategic objectives.
What does that mean for 21st century projects?
At the beginning of 2009 many people see “unemployment” as an overwhelming problem. However, a lack of resources and human capital is more likely to be the bigger challenge of the 21st century. The number of experienced project management professionals falls far short of requirements.