8.11 Modeling Evaluation of Alternatives and Trade Studies
A common use of constraint blocks is to support trade studies. A trade study is used to compare a number of alternative solutions to see whether and how well they satisfy a particular set of criteria. Each solution is characterized by a set of measures of effectiveness (often abbreviated “moe’s”) that correspond to the evaluation criteria, and have a calculated value or value distribution. The moe’s for a given solution are then evaluated using an objective function (often called a cost function or utility function), and the results for each alternative are compared to select a preferred solution.
Annex D of the SysML specification introduces some concepts to support the modeling of trade ...
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