QFD-理论案例.ppt

1、Quality Function Deployment,QFD for Software Requirements Management,Guy Davis Carmen Zannier Adam Geras,Objectives,Upon completion of this chapter, students will: Understand what Quality Function Deployment (QFD) is Understand how QFD compares to other software development life cycles Be able to id

2、entify the primary QFD tools and concepts Be able to identify the QFD practices that might be useful in non-QFD working environments,1. Introduction to QFD,1(a) QFD - Definition,1(a) QFD Definition (Cont.),ASI, 2000,1(b) QFD - Benefits,ASI, 2000,1(c) QFD - History,1(d) Software Engineering Context,1

3、(e) Requirements Engineering Context,2. QFD Life Cycle Considerations,QFD Process SQFD Process,2(a) Traditional QFD Phases,2(b) Adapting QFD to Software,2(b) SQFD Process,3. The House of Quality,3(a) Customer Requirements,3(b) Affinity and Tree Diagrams,Exercise 1 Affinity Workshop,3(c) The Planning

4、 Matrix,Quantifies Customer Requirements. Quantifies Perceptions of Existing Products. Allows adjustment based on design team.,Customer Satisfaction existing products fulfilling specified requirements. Improvement Ratio = Planned Performance / Existing Performance Sales Point weight for marketabilit

5、y Overall Weighting = Importance Weighting x Improvement Ratio X Sales Point,3(c) The Planning Matrix,3(c) The Planning Matrix,3(d) Technical Requirements,Engineering Characteristics, Voice of the Company. Identify Measurable Characteristics related to Customer Requirements. Direction of change incl

6、uded to lead to improvement of product performance.,Critical Question: How significant is technical requirement A in satisfying customer requirement B?,3(e) Interrelationships,Between customer requirements and technical requirements Translation and correlation step Critical to generate consensus bet

7、ween development team and customers.,3(e) Interrelationships,3(f) “The Roof”,Considers impact of technical requirements on each other Feature to feature comparison Augment or impede? Critical Question: Does improving one requirement cause a deterioration or improvement in another requirement?,3(f) “

8、The Roof”,3(g) Targets,Summarize previous steps Draw conclusions Consists of: Technical Priorities Competitive Benchmarks Final Product Targets,Results from previous steps: Customer requirements Prioritized customer requirements Technical requirements Correlated requirements Feature interdependencie

9、s,3(h) Technical Priorities,3(i) Competitive Benchmarks,Webbing strength,Meets standards,Padding thickness,# of buckles,Harness weight,3(j) Final Product Targets,3(k) House of Quality Summary,Inputs: Customer requirements Technical requirements Customer priorities Market reality / competitive analys

10、is Organizations strengths must recalculate,4. QFD Life Cycle Comparisons,4(a) QFD and Cleanroom,SAIC, 2001,4(b) QFD and SASD,4(c) QFD vs. JAD,4(d) QFD and PD,4(e) QFD vs. RAD,4(f) QFD vs. SSM,Wilson, 2001,4(g) QFD and RUP,Ronin, 2001,4(h) QFD and XP,Wells, 2001,5. Conclusions,5. Conclusions (Cont.),5. Conclus