© GIT3
Key Concepts
• Structured Concept Generation processes• Functional Decomposition• Solution Principle Matrices• Morphological Charts• Objective Concept Evaluation
Outline
© GIT4
1. Review Design Tools CoveredPUF and HoQ
2. Concept GenerationWhat is structured concept generation?
3. Design Tool 5 – Functional Decomposition4. Design Tool 6 – Solution Principle Matrix5. Design Tool 7 – Morphological Chart
6. Concept EvaluationWhat is structured concept generation?
7. Design Tool 8 – Evaluation Matrices
1. Design Tools to-date
© GIT5
A. Customer/Product RequirementsProblem understanding, Initial Analysis
B. Design SpecificationTarget Performance Metrics, Design Constraints
C. Conceptual DesignI. Concept Generation
II. Concept Evaluation
D. Detail DesignE. PrototypingF. Design Finalization
I. Specification for Production
DT1 – P.U.F DT2 – H.o.Q
DT4 – Design Spec. Sheet
DT3 – Function tree
DT5 – Functional Decomposition
DT6 – S.P.M DT7 – Morph. Chart
DT5 – Evaluation Matrices
2. Concept Generation
© GIT6
• Systematic identification of design alternatives• Many alternatives• Synthesis of concepts from function-level design
solutions (How’s)
What is Concept Generation
Design Tools• DT5 – Functional Decomposition• DT6 – Solution Principles Matrix• DT7 – Morphological Chart• DT8 – Evaluation Matrices
7
3. DT5 – Function Decomposition
1 2 3 54 6
7
1 2 3+4 5 6
7
Feed in1
Prepare2
Dispense3
Shape4
Separate5
Feed Out6
Return7
Dough ShapedDough
Waste Waste WasteAdditives
1 2 3+4+5 6
7
1 2+3 4+5 6
7
Shape DoughShaped Dough
ElossDoughAdditives
I
E
© GIT
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4. DT6 - Solution Principle Matrix
Sub-func.
Solution Principles(Idea/Source)
1Idea:(Mechanical)RubonMaterial
(Mechanical)Squirt Material
(Mechanical)PlaceMaterial(likeLetterset)
(Chemical)Changepaper composition
Source:Standardproduct Team#2 Letterset Acidetching
1
1
(Chemical)Changepaper color(likeLitmuspaper)
(Electrical)Burnpaper (spark)
(likeoldfashionedstripchart recorders)
(Electrical)ElectrifyPaper (glow
discharge)
(Electrical)Staticchargetoholdmark
on(likeEtch-A-Sketch)
Fisher Scientific Team#3 Team#1 Etch-A-Sketch
1
(Thermal)Burnpaper (flame)
(Thermal)Heat paper (glowdischarge)
(Thermal)Melt onMark
(Magnetic)Attachmagneticmaterial(likerefrigerator magnets)
Team#2 Team#2 Waxseals Gift Store
2
(Biological)Growbacteria, fungus
(Biological)Modify(digest?)paper
(Optical)Changelight propertiesof
paper (reflectance, polarity)
(Optical)Changelight (hologram)
Team#2 BioTechMagazine Team#2 Team#2
2
(Mechanical)Ruboff Material
(Mechanical)Takeoff material
(Mechanical)Cover mark
(likewhiteout)
(Chemical)Changepaper composition
Standardproduct Team#2 Team#1 Team#2(Chemical)
Changepaper color(likedyingfabricthesame
color asastain)
(Chemical)Changemark(e.g., bleach)
(Electrical)Burnoff mark (spark)
ETC.
Team#1 Team#2 Team#2
Example: Design of a “Pencil” Sub-function 1: Make an Erasable MarkSub-function 2: Erase an Erasable Mark
© GIT
ME 2110: Creative Decisions and D i
9
4. Combining Solution Principles
Sub-Functions
\Solutions 1 2 j m
1 F1 S11 S12 S1j S1m
2 F2 S21 S22 S2j S2m
i Fi Si2 Sij Sim
n Fn Sn1 Sn2 Snj Snm
Combination of Principles1 2
Combination 1: S11 + S21 + … + Sn1Combination 1: S11 + S22 + … + Sn2
© GIT
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4. DT6 Example : A Simple Competition
20 ft
Star
t Lin
e
6.25 ft
12.5 ft
Objective: Place mass from Start line and place on target
11
Place Masson Target
MoveMass
Navigateto
Target
Brake onTarget
GeneratePower
TransmitPower
HitTarget
4. DT6 Example : A Simple Competition
Start with a Function Tree
12
Different working principles to satisfy the function “store energy” by varying the type of energy.
1
2
3
4
5
6
Mechanical Hydraulic Electrical Thermal
FlowingLiquid
HeatedLiquid
SuperheatedSteam
Type of EnergyWorking Principle
Battery
Inductance, L
Pot. Energy
mh
Hydraulicreservoire.g, Piston
Moving Massm
v
MassM, s, T
Flywheelω
J
+V-
J
vω WheeloninclinePlane
Liquid Res. Pot. E.
h
F
Spring Other SpringsComp. GasF
4. DT6 Example : A Simple Competition
13
5. DT-6 The Morphological Chart
Going from concept to physical reality
.........
Store/Acquire Power
Transmit Power
Brake on Target
Move Mass
Navigate to Target
Gravity Mouse Traps
Car Hit by Trap Rip Cord Effect Ramp Catapult
Rolling Friction String Break Anchor Rubber Stopper
Equal Size Wheels Larger Front Wheels
Rolling Sliding Projectile Launch...
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Concept 1: Gravity+Ramp+Friction BrakeConcept 2: Mousetrap+Rip Cord+String BrakeConcept 3: Gravity+Mousetrap+Friction Brake
Store/Acquire Power
Transmit Power
Brake on Target
Move Mass
Navigate to Target
Gravity Mouse Traps
Car Hit by Trap Rip Cord Effect Ramp Catapult
Rolling Friction String Break Anchor Rubber Stopper
Equal Size Wheels Larger Front Wheels
Rolling Sliding Projectile Launch...
5. DT-6 Morph Chart Example
Outline
© GIT15
1. Review Design Tools CoveredPUF and HoQ
2. Concept GenerationWhat is structured concept generation?
3. Design Tool 5 – Functional Decomposition4. Design Tool 6 – Solution Principle Matrix5. Design Tool 7 – Morphological Chart
6. Concept EvaluationWhat is structured concept generation?
7. Design Tool 8 – Evaluation Matrices
ME 2110: Creative Decisions and Design 17
The Egg Basket Central Nest
6. Concept Evaluation Intro Example
ME 2110: Creative Decisions and Design 18
A) Each rotten egg in your zone is -3 pointsB) Each regular egg (from the middle level of
the nest)in your zone is 1 pt.C) Each Big Egg (from the top level of the
nest) in your zone is 3 pts.D) All eggs in your basket are valued at 3X
the above values.
6. Concept Evaluation Intro Example
ME 2110: Creative Decisions and Design
Concept 1 2 3 4 5
CriteriaA DB AC TD UE MFΣ+Σ-ΣS
+ = better than datum; - = worse than datum; S = same as datum
6. DT8 – Evaluation Matrices
20
+ = better than datum; - = worse than datum; S = same as datum
Concept
Criteria
Cost
GatheringAbility
Safety
RobustnessEase ofAssemblyΣ+Σ-Σs
1 2 3 4 5Bunny
D
A
T
U
M
Snake
+
S
S
S_
113
_
_
+
+
+
320
_
_
+
+
+
320
VoodooSpell
__
_
+
+
230
6. DT8 – 1st Level Evaluation Matrices
21
Pts. Meaning
0 unsatisfactory
1 just tolerable
2 adequate
3 good
4 very good (ideal)
Pts. Meaning0 absolutely useless
solution1 very inadequate
solution2 weak solution3 tolerable solution4 adequate solution5 satisfactory solution6 good solution with few
drawbacks7 good solution8 very good solution9 solution exceeding
the requirement10 ideal solution
6. DT8 – Evaluation Scales
ME 2110: Creative Decisions and D i
23
WEIGHT(0-4)
C1(RUB ON
- RUBOFF)
C2(PLACE
ON -TAKEOFF)
C3(PLACE
ON - RUBOFF)
WORKING PRINCIPLE:MAKES ERASABLEMARK
4 4 4
REMOVESERASABLE MARK
4 3 3
EMBODIMENT:HOLDS POINT 3 2 4
PRODUCTION:FEW PARTS 4 3 2SIMPLE TO MAKE 4 2 2
ASSEMBLY:EASY 3 3
OPERATION:COMFORTABLE TOUSE
2 2 3
LOW USE FORCE 3 3 4
MAINTENANCE:SHARPENABLE 4 4 4
SAFETY:DOESN’T HARMUSER BYBREAKING INTOSMALL, HARMFULPARTS
4 3 4
NOT POISONOUS 0 4 3
TOTAL POINTS:
6. DT8 – 3rd Level Evaluation Matrices
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