Design for Six Sigma (DFSS) can be accomplished using any one of many methodologies. IDOV is one popular methodology for designing products and services to meet six sigma standards.
IDOV is a four-phase process that consists of Identify, Design, Optimize and Verify. These four phases parallel the four phases of the traditional Six Sigma improvement methodology, MAIC – Measure, Analyze, Improve and Control. The similarities can be seen below.
The Identify phase begins the process with a formal tie of design to Voice of the Customer. This phase involves developing a team and team charter, gathering VOC, performing competitive analysis, and developing CTQs.
The Design phase emphasizes CTQs and consists of identifying functional requirements, developing alternative concepts, evaluating alternatives and selecting a best-fit concept, deploying CTQs and predicting sigma capability.
The Optimize phase requires use of process capability information and a statistical approach to tolerancing. Developing detailed design elements, predicting performance, and optimizing design, take place within this phase.
The Validate phase consists of testing and validating the design. As increased testing using formal tools occurs, feedback of requirements should be shared with manufacturing and sourcing, and future manufacturing and design improvements should be noted.
About The Author
David Woodford has a Ph.D. and a D.Sc from the University of Birmingham in England. He worked for GE in both the Turbine Technology Laboratory and in the Corporate R&D Center. From 1986 to 1994 he was Professor of Materials Engineering at Rensselaer Polytechnic Institute. He has published over one hundred and twenty papers in the general area of materials for energy conversion systems and has given numerous invited talks. Dr. Woodford is President, MPa, Inc. in Santa Barbara and Visiting Professor at the University of California at Santa Barbara.