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Information visualization tools are being promoted to aid decision support. These tools assist in the analysis and comprehension of ambiguous and conflicting data sets. Formal evaluations are necessary to demonstrate the effectiveness of visualization tools, yet conducting these studies is difficult. Objective metrics that allow designers to compare the amount of work required for users to operate a particular interface are lacking. This in turn makes it difficult to compare workload across different interfaces, which is problematic for complicated information visualization and visual analytics packages. We believe that measures of working memory load can provide a more objective and consistent way of assessing visualizations and user interfaces across a range of applications. We present initial findings from a study using measures of working memory load to compare the usability of two graph representations.

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This document represents the results of Task 1 (Requirements Elicitation) in Phase 2 of the Contingency Contractor Optimization project. The aim of the overall effort is to create a tool for the contingency contractor element of total force planning during the Support for Strategic Analysis (SSA). The goal of Phase 2 is to develop an electronic storyboard prototype of a tool for use in conjunction with the strategic planning framework of the SSA that can be used for communication with senior decision makers and other strategic contract support stakeholders.The requirements presented here are those on which the electronic storyboard prototype developed in Phase 2 were based, and are also intended to be the basis for the functional tool to be developed in Phase 3. 4 ACKNOWLEDGMENTS