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Most often it is the DMAIC methodology that is used and involves bringing about improvements in the existing systems. Likewise, there are some organizations that are involved in constant innovation of new products and services. This is the core concept of DFSS - which stands for Design for Six Sigma. The DFSS approach is one of designing a new product or service to achieve Six Sigma quality. What is DFSS? The DMAIC methodology has universal acceptance. DFSS is more focused on developing new products or redesigning them. Development is mostly done from scratch, or may sometimes involve redesigning of a specific product. You will find different definitions of DFSS for different organizations. DFSS is an approach more than a methodology. The expected Six Sigma level is at least 4.5 (i.e. approximately 1 defect per thousand opportunities), but can be 6 depending upon the product. A complete understanding of CTQ and customer needs is a must for achieving this level before designing and implementing such a product. DMADV stands for Define, Measure, Analyze, Design and Verify. You will see that the DFSS and DMADV are very similar, wherein one may even call DMADV a methodology for implementing DFSS. The Design phase is the only difference between DMAIC and DFSS. Similar to DMAIC, the Define and Measure steps are followed by an Analyze phase. The Analyze phase differs in the DFSS methodology, as its focus is the critical assessment for the void between the new product and the criteria set. The Voice of Customer is the basis of such analysis, and the criteria have been based on this data. Difference Between DFSS and DMAIC Many experts are of the opinion that with similarities between Six Sigma and DFSS, DFSS can be called as a logical extension of Six Sigma. Though this may be true, there are some differences between DMAIC and DFSS. The basic difference lies in the fact that DMAIC is a methodology that focuses on bringing about improvements to the existing products and services of the organization. DFSS aims at designing a new defect free product or service to meet CTQ factors that will lead to customer satisfaction. DMAIC focuses on detecting and solving problems with existing products and services, while DFSS approach is that of preventing a problem. The benefits and savings of DMAIC are quickly quantifiable while those of the DFSS will be visible only in the long term. It can be around six months or more before the result of a newly developed product is visible. One may say that DMAIC is based more on manufacturing or transactional processes, while DFSS encompasses marketing, research and design as well. DFSS brings about a huge change of roles in an organization. The DFSS team is cross-functional, as the key factor is covering all aspects for the product from market research to process launch. Thus, DFSS provides tools to get the improvement process done efficiently and effectively. It proves to be powerful management technique for projects. It optimizes the design process so as to achieve the level of Six Sigma for the product.
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Tony Jacowski is a quality analyst for The MBA Journal. Aveta Solution's Six Sigma Online offers online six sigma training and certification classes for six sigma professionals including, lean six sigma, black belts, green belts, and yellow belts.
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