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Quality Function Deployment

Quality Function Deployment. Team 6 Rochelle Robles David Harty Johnathan Pesce. Overview. Introduction/History/Overview House Of Quality Presentation QFD in Software Development. Introduction. Origin: Yoji Akao introduced the concept to Japan in 1966

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Quality Function Deployment

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  1. Quality Function Deployment Team 6 Rochelle Robles David Harty Johnathan Pesce

  2. Overview • Introduction/History/Overview • House Of Quality Presentation • QFD in Software Development

  3. Introduction • Origin: Yoji Akao introduced the concept to Japan in 1966 • Quality Function Deployment (QFD) is a structured step- by-step methodology developed to : • make the task of transforming customer needs into actual technical requirements easier and more effective. • design quality into a product. • provide total customer satisfaction.

  4. Advantages • Focuses on development efforts up-front • Reduces defects by preventing them at an early stage • Decreases design changes • Shortens the development cycle • Reduces cost • Improves productivity • Effective means of collecting and documenting information

  5. QFD vs. Traditional Business Methodologies

  6. Disadvantages • Process has proven to be lengthy • Lots of time spent focusing on the future of the product • Top Management approval and support is almost always required • Focuses on involving the customer even in technical affairs • Not standardized

  7. Process Improvement Applied Marketing Science, Inc. claims to have found a solution which reduced the time required to train a team and complete a full House of Quality by about 50 percent. This took the organization from about eight to ten days of team meetings to four or five days of team meetings and without sacrificing any rigor or detail. • Their QFDs start with a complete, formal Voice of the Customer derived entirely from customers, not the team’s own opinions. • A voting technique was implemented for assigning the correlations to each cell of the matrix. • In the case that voting is necessary, each team member is given a hand-held device they can use to "dial in" their vote. A computer compiles the data instantaneously and projects the vote distribution on a monitor.

  8. House of QualityPresentation...

  9. QFD in Software Development • THE key issue • quality-oriented techniques • product quality and product development

  10. Adapting QFD to Software • QFD = traditional manufacturing • SQFD = software development • originated in Japan in 1984 • 1988: Digital Equipment Corporation (DEC)

  11. SQFD (Haag, 1996) • Improving the quality of the software development process • Implementing quality improvement techniques • Emphasis on the requirements elicitation phase

  12. SQFD cont… • Adaptable to any software engineering methodology • fewer design changes • software systems requiring less maintenance

  13. The SQFD Model

  14. QFD and OO • Different terminology • Similar underlying concepts • QFD offers value-added tools to OOA

  15. Object Oriented QFD Actors Customers Use Cases “function” Emphasis on Modeling System User “Voice of the Customer” OO vs. QFD

  16. Affinity Diagram and Classes

  17. Ex: Actors X Use Case

  18. Matrix of Matrices (SQFD/OO)

  19. Conclusion Customers Expectations Voiced Desires Unperceived Turnons

  20. References • Dean, E.B. “Quality Function Deployment from the Perspective of Competitive Advantage” http://akao.larc.nasa.gov/dfc/qfd.html • Lamia, W. M. “Integrating QFD with Object Oriented Software Design Methodologies” Transactions from the Seventh Symposium on Quality Function Deployment,, Novi MI, 11-13 June, pp. 417-434. 1995 • Lowe, Dr A.J., Ridgway,Prof. K. “Quality Function Deployment” www.shef.ac.uk/~ibberson/qfd.html University of Sheffield, England

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