A summary project contains several projects and allows:
Cross-project capacity planning
Optimal resource utilization between several projects
You can group selected projects into a summary project and later add them to a portfolio.
Requirement: Only the projects in the summary project may be added, which use a common resource pool.
All views are available for the summary project, from the gantt chart to the resource chart. In the summary project all activities like be carried out in a usual project, i.e. You can create tasks, allocate resources, correct activities, or save results.
Note: A new Project can not be created in the summary project. You should create a new project separately and then add to a summary project.