Scenario Analysis refers to the systematic evaluation of alternatives. Another wordfor alternatives that users will encounter often with CommunityViz is scenario. Eachalternative, or Scenario, is evaluated in the context of desired outcomes, whichthe user defines. This allows the user to track the effects of different Scenarioson factors which are important to the community. For example, a community with severalhousing development alternatives might want to assess their impacts on open spaces.Scenario Constructor could quantify these effects and compare them across Scenarios.Scenario Constructor supports the quantitative analysis and comparison of Scenarios.The other two modules of CommunityViz, Policy Simulator and SiteBuilder 3D, extendScenario Analysis into the realms of long-term predictive and visual analysis.