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Accurate determination of viscoelastic properties is essential for the proper design of isolation mounts, damping layers, and resonant dampers. Polymeric materials typically used in these applications have complex stiffness moduli which are a function of temperature, frequency, and strain level; but these effects are not always accounted for when specifying material behavior. Simplifications in mathematical analysis and procedure using a resonant beam technique permits a more convenient specification of properties of samples tested in extension or shear configurations. Despite this test simplification, material specification would be unnecessarily confusing unless presented using a new format termed a reduced temperature plot [D. I. G. Jones, Shock and Vibration Bulletin, 1978]. The intent of this paper is to demonstrate how a computer oriented process can analyze test data, put the data into simplified format using reduced frequency analysis, and then use the information in the design of viscoelastic components.