QFD for product & business development

DFX and DFSS: How QFD Integrates Them

Quality function deployment provides an architecture that can effectively position and combine design for excellence and design for Six Sigma.

DFX and DFSS: How QFD Integrates Them – Introduction

   Design for excellence (DFX) and design for Six Sigma (DFSS) have been two of the most popular concepts in quality management in recent years, but very little has been written comparing DFX and DFSS. This article
aims to clarify the differences between them in concept and application and further identify how to integrate them effectively by using quality function deployment (QFD). It is a good starting point to understand theroots of the words “excellence,” “Six Sigma” and “quality.” Aristotle might have been the first person to talk on the subject of quality in any systematic way. In his book Metaphysics, he gave four definitions of quality and later summarized them with two basic meanings: “differences of real substance” and “mode of a subject in motion, of itself.” Good (excellence) and bad (inferiority) are parts of the latter mode. Simply speaking, there are two aspects of quality, according to Aristotle: different quality and good quality. Discussions of quality have revolved around these two aspects since Aristotle’s time. Whether you’re creating different quality or trying to achieve good quality, you must build quality into a product when it is planned and designed. Quality built in at this stage has the maximum return in terms of cost benefits and customer satisfaction. It far surpasses the improvements brought about by relying separately on promotional efforts in selling or detection and modification in manufacturing after a product is released. DFX and DFSS both help build quality into the design stage.

In 50 Words Or Less

  • Quality function deployment provides an architecture that can effectively position and combine design for excellence and design for Six Sigma.
  • By combining these methods, manufacturers can differentiate a product in terms of quality prior to the actual production process

by Jui-Chin Jiang, Ming-Li Shiu and Mao-Hsiung Tu

Read the full article →PDF DFX and DFSS:How QFD Integrates Them

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