Modular product platforms have been shown to provide substantial cost and time savings while still allowing companies to offer a variety of products. As a result, a multitude of product platform methods have been developed over the last decade within the design research community. However, comparison and integration of suitable methods is difficult since the methods have, for the most part, been developed in isolation from one another. In reviewing the literature in modularity and product platforms, we create a generic set of 13 platform design steps for developing a platform concept. We then examine a set of product platform concept development processes used at several different companies, and from this form a generic sequence of the steps. We then associate the various developed methods to the sequence, thereby enabling the chaining together of the various modular and platform design methods developed by the community.

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BACKGROUND AND PURPOSE:As part of a multicenter cooperation (Aneurysm-Like Synthetic bodies for Testing Endovascular devices in 3D Reality) with focus on implementation of additive manufacturing in neuroradiologic practice, we systematically assessed the technical feasibility and accuracy of several additive manufacturing techniques. We evaluated the method of fused deposition modeling for the production of aneurysm models replicating patient-specific anatomy.

By means of radioactivity, the extent of silver deposition on platinum cathodes was determined at various potentials under conditions closely approaching equilibrium. For any specific solution having a concentration of silver of 10 -~ M or greater, the resulting curve agreed well with the polarographic curve. For concentrations equal to or smaller than 10 -7 )5, the amount of silver was insufficient to cover the electrode and the resulting deposition curves often shifted to a potential several tenths of a volt more "noble" than that predicted by the Nernst equation. The shift, which may be the result of alloy formation, was influenced greatly by the "inert" electrode material.Changes in the electrode area and in the volume of solution were found to shift the position of the deposition curve in accordance with predictions based upon the Nernst equation. Complexing agents decreased and sometimes eliminated the shift toward noble behavior whereas, in one case, a higher concentration of acid produced a larger shift toward "nobility."

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