Product details

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Management article
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Reference no. 90114
Published by: Harvard Business Publishing
Published in: "Harvard Business Review", 1990

Abstract

Product "robustness" is a function of good design. Still, most traditional quality programs concentrate on the factory. Zero Defects says that when parts come in within tolerances, the product will be fine. But parts just within tolerances have no advantage over those that just miss; it is better to miss a target consistently than to hit it haphazardly. Robust products maximize "signal-to-noise" ratios of component parts. Product designers can maximize these ratios by running experiments according to orthogonal arrays, which reckon the average effect of each variation on all other variations.

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Abstract

Product "robustness" is a function of good design. Still, most traditional quality programs concentrate on the factory. Zero Defects says that when parts come in within tolerances, the product will be fine. But parts just within tolerances have no advantage over those that just miss; it is better to miss a target consistently than to hit it haphazardly. Robust products maximize "signal-to-noise" ratios of component parts. Product designers can maximize these ratios by running experiments according to orthogonal arrays, which reckon the average effect of each variation on all other variations.

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