Capstone DesignCapstone Design

MAE 4980

Coordinator: Dr. A. Sherif El-GizawyCoordinator: Dr. A. Sherif El-Gizawy

DesignFunctionCost

Materials SelectionProperties & Cost

Manufacturing

Interrelation of Design, Materials, and Manufacturing For Generating a Product

Design ProcessProducts, Tooling, Processes, Testing Methods, Handling SystemsProducts, Tooling, Processes, Testing Methods, Handling Systems

InformationInformation-Functions-Customers Attrib.-Realistic Constraints-Eng. Characteristics

Specifications Specifications (Engineering Analysis)(Engineering Analysis)-Geometry-Materials-Manufacturing

OptimizationOptimization-Quality-Cost-Safety

ConceptualDesigns Configurati

on

QFD

FD

Final Design&Prototypes

Physical Prototype-Fabrication &Assembly-Testing-Fine Tuning

Tools: QFD, Solid Modeling, Data Bases, FEM, FMEA

Conceptual DesignConceptual Design

•Problem Definition and Objectives.Problem Definition and Objectives.•Project Planning.Project Planning.•Collecting Information.Collecting Information.•Generate Concepts.Generate Concepts.•Select Final Concept that Meet ObjectivesSelect Final Concept that Meet Objectives

Relationship MatrixRelationship Matrix

6

Cu

sto

mer

Cu

sto

mer

Req

uir

em

ent

Req

uir

em

ent

““ Wh

ats”

Wh

ats”

1

CompetitiveCompetitiveAssessmentAssessment

2

Correlation Correlation MatrixMatrix

5

Engineering Engineering CharacteristicsCharacteristics

4

Imp

ort

ance

Rat

ing

Imp

ort

ance

Rat

ing

3

Quality Function DeploymentQuality Function Deployment (QFD or House of Quality)(QFD or House of Quality)

Quality Function DeploymentQuality Function Deployment (QFD or House of Quality)(QFD or House of Quality)

QFD, is a planning and problem solving tool for translating customerQFD, is a planning and problem solving tool for translating customerrequirements into the engineering characteristics of the new design.requirements into the engineering characteristics of the new design.

Components of the House of Quality: Components of the House of Quality:

1.1. Customer Requirements, “WHATS”Customer Requirements, “WHATS”

Customers requirements (CR) are collected by the design team from interviews, data bases, and published data. CR are then organized inside QFD matrix to aid in identifying design specifications and constraints.

1

2. Competitive Assessment, 2. Competitive Assessment,

Assessment of the existing competitive productsin terms of meeting customer requirements. It startswith ranking each CR on a scale of 1 to 5 for each ofthe selected competitors.

3. Importance Rating, 3. Importance Rating,

The results in section 2 will lead to planned improvementsin order to top the competitors. This will result in aset of importance rating.

2

3

44. Engineering Characteristics, “HOWS”4. Engineering Characteristics, “HOWS”

Engineering characteristics (ECs) are specificdesign details that can be measured (weight, force, velocity, efficiency…etc.), that are needed to meet CRs.

55. Correlation Matrix, 5. Correlation Matrix,

Engineering characteristics may be dependent on each other. The degrees of interdependenceare presented in the roof. Strong relation is given 9 and 3 for medium relationship.

6

6. Relationship Matrix, 6. Relationship Matrix,

It presents the correlation between Engineering Characteristics (ECs) and Customer Requirements(CRs). A scale of 9-3-1-0 is used to weight these relationships.

7. Absolute Importance, 7. Absolute Importance,

The product of the number in each cell in matrix “6” times the importance rating in “3” are added togetherFor each column and introduced in matrix “7”.

8. Relative Importance, 8. Relative Importance,

The absolute importance in “7” is normalized through dividing each value by the total sum of all values time 100.The larger value indicates stronger effect of EC on CRs.

Relationship MatrixRelationship Matrix

6

Cu

sto

mer

Cu

sto

mer

Req

uir

em

ent

Req

uir

em

ent

““ Wh

ats”

Wh

ats”

1

CompetitiveCompetitiveAssessmentAssessment

2

Correlation Correlation MatrixMatrix

5

Engineering Engineering CharacteristicsCharacteristics

4

Imp

ort

ance

Rat

ing

Imp

ort

ance

Rat

ing

3

9. Competitive Assessment, 9. Competitive Assessment,

Present data that compares (benchmarks) each of the design performance characteristics with thoseof the potential competitors. A scale of 1-5 (best) is used.

10. Technical Difficulties, 10. Technical Difficulties,

Assignment of the degree of success to attain the Desired values for each EC. A scale of 1-5 (high probability of success) is used.

11. Target Values, 11. Target Values,

Assignment of feasible target value for each EC basedOn understanding the constraints and limitation indicatedIn all components of QFD. The values in this room are usedto evaluate the level of progress to meet CR as the designProject proceeds.

Example: Example: Protection Case for CDProtection Case for CDEng. Design P.72Eng. Design P.72