The summary service enables you to roll up and save resource quantity, cost, and/or custom user field information starting at an EPS node or from a specific WBS level. You can then view summary data such as planned value and other cost values at various levels of the EPS.
You can customize EPS columns to view summary data before you open a project.
You can roll up data using the Tools, Summarize command. P6 Professional considers the summary settings for each project before including it in the rollup. When you roll up data, P6 Professional saves the new summary values to the project database, overwriting any previously calculated summary values.