Page 210 - Design for Six Sigma a Roadmap for Product Development

Design for Six Sigma Project Algorithm 183

Sigma standards. It is a four-phase process that consists of identify,
design, optimize, and verify (IDOV). These four phases parallel the
four phases of the ICOV process presented in this book.
■ Identify phase. It begins the process with a formal tie of design to the
voice of the customer (VOC). This phase involves developing a team
and team charter, gathering VOC data, performing competitive
analysis, and developing CTSs.
■ Design phase. This phase emphasizes CTSs and consists of identify-
ing functional requirements, developing alternative concepts, evalu-
ating alternatives and selecting a best-fit concept, deploying CTSs,
and predicting sigma capability.
■ Optimize phase. The optimize phase requires use of process capabil-
ity information and a statistical approach to tolerancing. Developing
detailed design elements, predicting performance, and optimizing
design are activities within this phase.
■ Validate 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 production operations and
sourcing, and future operations and design improvements should be
noted.
Another popular Design for Six Sigma methodology is called
DMADV, and it retains the same number of letters, number of phases,
and general feel as the DMAIC acronym. The five phases of DMADV
are as follows:

■ Define. Define the project goals and customer (internal and external)
requirements.
■ Measure. Measure and determine customer needs and specifications;
benchmark competitors and industry.
■ Analyze. Analyze the process options to meet the customer needs.
■ Design. Design (detail) the process to meet the customer needs.
■ Verify. Verify the design performance and ability to meet customer
needs.

Another flavor of the DMADV methodology is DMADOV, that is,
design, measure, analyze, design, optimize and verify. Other modified
versions include DCCDI and DMEDI. The DCCDI version is being
pushed by Geoff Tennant and is defined as define, customer concept,
design, and implement, a replica of the DMADV phases. DMEDI is
being taught by PriceWaterhouseCoopers and stands for define, mea-
sure, explore, develop, and implement. The fact is that all these DFSS