When a range of alternative designs has been created, the designer is then faced with the problem of selecting the best one. There are a lot of economic evaluation methods that are with single criterion or multi-criteria and deterministic or nondeterministic. The selected methods in the paper are the fuzzy present worth method for the economic analysis and the fuzzy scoring method for the strategic analysis. The triangular fuzzy numbers calculated are compared by a certain method. The method is applied to the economic and strategic design of motorcars.