RAND's Portfolio Analysis Tool (PAT)
Theory, Methods, and Reference Manual
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Supplemental Files (updated 08-03-2018)
The supplemental files are Excel workbooks containing a version of the Portfolio Analysis Tool (PAT) without data as well as one that contains the data used to generate the examples in the document.
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Strategic planning often involves investing in a mix of capabilities and activities and assessing the adequacy of options for meeting a variety of objectives. Such an analysis “portfolio” may be characterized by allocation across investment categories or by the corresponding allocation across objectives. RAND's Portfolio Analysis Tool (PAT) was designed to facilitate strategic analysis dealing with both uncertainty and differences of perspective. PAT generates high-level summary depictions for discussing issues of balance. It uses a spreadsheet-based format with options shown in rows and various measures of option goodness in columns. The PAT user can drill down (zoom) to understand the basis of high-level characterizations and to identify troublesome problems. PAT can depict various types of risk in a number of ways and present options that mitigate or hedge against those risks. Built on an earlier application-specific tool, PAT-MD, which was developed for the U.S. Missile Defense Agency's Program Integration Office (MDA/PI), PAT reflects lessons learned, and it has evolved considerably. The approach to analysis enabled by PAT is oriented toward assisting high-level decisionmakers to frame their thinking about balance, to construct good multifaceted options for consideration, and to make subsequent choices. This report documents the theory and methodology of PAT and serves as a combined reference manual and user's guide. It will be of interest primarily to analysts and those who manage analysis.
Table of Contents
Overview of PAT
PAT Input Worksheets
PAT Output Worksheets
Details of the Methodology
Marginal and Chunky Marginal Analysis
Quickstart on Using PAT
Transferring Data from an Earlier Workbook
Editing and Neatening