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 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.

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

QFD vs. Traditional Business Methodologies

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

Process Improvement 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. 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.

House of Quality Presentation... Presentation...

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

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

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

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

The SQFD Model

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

OO vs. QFD Object OrientedQFD ActorsCustomers Use Cases“function” Emphasis on Modeling System User “Voice of the Customer”

Affinity Diagram and Classes

Ex: Actors X Use Case

Matrix of Matrices (SQFD/OO)

Conclusion Customers Expectations Voiced Desires Unperceived Turnons

References Dean, E.B. “Quality Function Deployment from the Perspective of Competitive Advantage” Lamia, W. M. “Integrating QFD with Object Oriented Software Design Methodologies” Transactions from the Seventh Symposium on Quality Function Deployment,, Novi MI, June, pp Lowe, Dr A.J., Ridgway,Prof. K. “Quality Function Deployment” University of Sheffield, England