The Portfolio Pie Charts allow the project portfolio to be analyzed and assessed for mix against various parameters as shown in the examples below.  This worksheet contains six pie charts each of which can be set up with default charting parameters chosen by your management team as a meaningful view of your project portfolio.  These parameters can be changed by any user as part of their working session.  When accessing charts in the Portfolio and Resource Analysis mode chart parameter changes are saved and retained when the analysis instance is saved.