RAND's Portfolio Analysis Tool Theory Methods and Reference Manual - PAT - Technical Report Author:Paul K. Davis, Paul Dreyer This report is a reference manual and user1s guide for RAND1s Portfolio Analysis Tool (PAT), a spreadsheet-based software application for facilitating decisions dealing with uncertainty and different perspectives. PAT generates summary depictions to address issues of balance, using a spreadsheet-based format. PAT assists high-level decisionmaker... more »s in framing their thinking about balance, constructing good multifaceted options, and making choices.« less