Post on 07-Apr-2018
Deterministic Design Process16 September 2014
Today’s Action Items
In Class
Quiz (5 min)
Deterministic Design Process
Surgeon Support Case Study – Bram Waumans, MS
Release Kinematic Coupling Lab
Proposal Due 23 September
Lab Due 7 October
Announce Teams
Merge Team Schedules
Weekly team meeting time
Weekly mentor meeting time
Vivre, ce n'est pas copier, c'est créer!Life, it’s not for copying, it’s for creating!
John Dal Piaz, Président CGTDesigner SS Normandie,Winner Blue Riband 1935
He who works with his handsis a laborer.
He who works with his handsand his head
is a craftsman.He who works with his hands
and his headand his heart
is an artist!
Francis de Assisi
Deterministic Design ProcessNevan Hanumara
Folkers Rojas
Alex Slocum
Deterministic Design Process
• You can’t force creativity …
but you can organize and document the process.
• Deterministic Design
= structure to identify & develop opportunities.
≠ is not brainstorming, but it includes it.
• However, each decision is justified and recorded
What are the three Ds?
Deliverables
Deadlines
Dollars
Product Development
Discovery Design Development Building & Testing
Prior ArtFunctional Reqs.StrategiesBench LevelSelect Strategy
ConceptsAnalysis / PrototypeDesign For ManufactureModularizeMost critical module (MCM)
Fabricate MCMFabricate other modulesIntegrateComplete prototypeTest. Debug. Test.Present / Document
Coarse Fine
Strategies vs. Concepts
Broad Solution Modalities• Use fundamental physics to
examine feasibility
• Thermal, structural, fluid, power, chemical, etc.
Specific StrategyEmbodiments• Mechanisms
• Circuits
• Calculations
• CAD models
Ph
D C
om
ics
Decisions – Pugh Chart
• Select a reasonable option, assign all 0s
• Assign following options 1 = better, 0 = same, -1 = worse
• Sum the results - discussion more important than results
Tourniquets CAT Click&
Pull
Pull & Twist
etc.
Reliability - X -
Ease of use - + +
Time to use - + +
Weight - X -
# Parts - X -
Score 0 -1 +2
Decisions – Gantt Chart
• Powerful project management tool
• Lays out critical tasks, start & due dates visually
• Guides resource deployment
• Shows overlap and dependencies
Week 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Identify Pilot Area
Instrument Area
Measure Baseline
Install Valves
Measure Impact
Gather and Process Data
FRDPARRCFunctionalRequirements
DesignParameters
Analysis References Risks Counter-measures
Establishing Functional Req.
• The customer does not know what they want
• But they know what they need
• Listen, observe
• Identify specific functions, not embodiments
• Quantify biggest source of problems
FRs to DPs
• Size of unit
• Loads, force, torque, etc.
• Materials
• Power source
• Time of usage
• Interface
• Cost of fabrication
Analysis: Toothpaste extrusion
ABore
AOpen
α
Die
Workpiece
CLP
Fextrude
References: Reading a Patent
• Look at the pictures
• Read the abstract/intro
• Examine the claims
• Review referenced patents
• Check other patents in class
• Google the assignee
• Google the inventors
Risks and Countermeasures
• Challenge: Discretize toothpaste delivery
• Functional Req.
• Strategies: Spray, Solid, and Slice existing
Look beyond your field
• Macondo blowout
• Main Solutions• Junk Shot*• Drill Relief Well
($300M)~ • Capping*• Containment #
• Costly Solutions• Second BOP• Shear Thickening Fluid
• Alternative solution …
Hair Ball Generation
Walk Through
Plaque in on the attack!
• Your mission, find a new way to remove it!• Functional Requirements (FR)
• Removes dental plaque• At home use• Consumable• Safe• …
• Strategy – Broad, physics based approach• Concept – Specific hardware design• Most Critical Module (MCM) – Guts that must work• Proof-of-concept – Demos only core function• No creeping featuritis!
FRDPARRCFunctionalRequirements
DesignParameters
Analysis Risks References Counter-measures
Removesplaque
LocationVolume…
At home SizeComplexity
Consumable Cost / use
Safe Target user
Example
Chemical
Thermal
Mechanical
Strategy
Analysis &Bench-level testing
Discovery
Coarse FineRefine FRs
FRDPARRCFunctionalRequirements
DesignParameters
Analysis References Risks Counter-measures
Removesplaque
Solvent
Mechanical
Concentration TimePressure
MSDS
Betweenteeth access
DepthWidth
Wand Oral cavityHand size
At home SizeComplexity
Counter spaceUser studies
Consumable Cost / use Chemicalformulation
Shelf Life
SafeIntuitive
TimersPressure limits
… …
Example
Chemical
Thermal
Mechanical
StrategyConcepts
Analysis &Bench-level testing
More AnalysisPrototyping
CAD
Discovery Design Development
Coarse FineRefine FRs
ForcePressure
FlowViscosity
Dwell
Safety!ChemistryStability
FRDPARRCFunctionalRequirements
DesignParameters
Analysis References Risks Counter-measures
Removesplaque
Solvent
Mechanical
Concentration TimePressure
MSDS Poison/Burn
Abrasion
Concentrationvs. timeLimit pressure
Betweenteeth access
DepthWidth
FluidMechanics
“Frank White”
At home SizeComplexity
Counter spaceUser studies
Unwieldy
Consumable Cost / use Chemicalformulation
Visit a shop Shelf life
SafeIntuitive
TimersPressure limits
User Guide
Example
Chemical
Thermal
Mechanical
StrategyConcepts
Analysis &Bench-level testing
MCM
Supporting Modules
More AnalysisPrototyping
CAD
Design
Discovery Design Development
Coarse FineRefine FRs
ForcePressure
FlowViscosity
Dwell
Safety!ChemistryStability
FRDPARRCFunctionalRequirements
DesignParameters
Analysis References Risks Counter-measures
Removesplaque
Solvent
Mechanical
Concentration TimePressure
MSDS Poison/Burn
Abrasion
Concentrationvs. timeLimit pressure
Betweenteeth access
DepthWidth
FluidMechanics
“Frank White”
Damage to gums
…
Wand Oral cavityHand size
HumanFactors
“Measureof a Man”
… …
At home SizeComplexity
Counter spaceUser studies
… Unwieldy Retracting Cord
Consumable Cost / use Chemicalformulation
Visit a shop Shelf life Sealed, QR cartridges
SafeIntuitive
Timers … AAMI/HE75 … User Guide…
Example
Chemical
Thermal
Mechanical
StrategyConcepts
Analysis &Bench-level testing
MCM
Supporting Modules
More AnalysisPrototyping
CAD
Design
Discovery Design Development Building & Testing
Coarse FineRefine FRs
ForcePressure
FlowViscosity
Dwell
Safety!ChemistryStability
• Gillette has 70% global market share
• Top: Fusion ProGlide - $11 handle, $17 - 4 pack
• Competition increasing & the Razor Wars
• Competitors’ disposables selling at $0.20
• Indians are very furry … but they like to shave
• Indian market: 400 million men
• India market stagnant: Vector 13%, Mach3 9%
• BOP $1- 3 per day, GDP PPP $3.8K (2011)
• Majority use double edge, $0.05/blade
• SuperMax DEs leader, 15% market share
• DEs rust easily & cause cuts
2010
Know thy customer
• Indian men have thick, high density hair
• Most don’t shave daily
• Low price point
• 2002 Solution – “Improved Vector”
• Rebranded, discontinued 1977 product
• Added “push bar” to clear clogged hair
• Tested with MIT’s Indian students
• Feedback - Loved it!
• Deployed in India - Massive fail!
• Razor won’t clear without running water
Really know thy customer
• 20 person team sent to India
• 1000 consumers, 3000 hours
• Actual shaving conditions:
• Crowded housing no electricity
• Early AM while still dark
• Sitting on floor
• 1 cup water, often no mirror
• 30 min to shave (vs. 5 - 7 in US)
• Cutting a real risk
• Functional Requirements
1. Affordability
2. Safety
3. Ease of use
Closeness unimportant
Success!
• Launched October 2010
• Design:
• 1 blade
• Safety comb
• Pivoting head
• Light, multiple grip handle
• Hanging hole
• 4 parts vs. 25 in Mach3
• Sold through local kiranas
• 15 INR (34¢), 5 INR (12¢) refill
• Consumers 6:1 preference over DE
• 50% market share
Surgeon Support Case Study
Bram Waumans, MS
Kinematic Coupling Assignment
Nevan Hanumara & Tyler Wortman
Kinematic Coupling
Design, build & test a Kinematic Coupling
• Hands-on warm up, develop tactile skills
• Familiarize with campus resources
• Demonstrate “exact constraint design”
• http://web.mit.edu/2.75/lab/assignments.html
Useful, decorative or a toy …but KISS
Do you need Hobby Shop membership?Reply to survey (e-mail & posted to Wiki)
KC Proposal (Due 23 September)
Select application
Design your KC and use analysis spreadsheet
Create a CAD or dimensioned hand drawing
Complete Fabrication plan
No fabrication is allowed without an approved plan!
Order Part Material Process Machine Estimated fab
time
1 top wood cut into disc band saw 20 min
2 base wood Cut into disc
Change to V bit
Add grooves
CNC router 1 hour program
20 min run
3 3 balls Wood glue into place 30 min + night
Report & Expo (Due 7 October)
Explain and justify your design, and the problem it solves
Describe your analysis,
Compare with experimental results
Document - Provide photos, part drawings, and/or sketches
Post to Wiki (Procrastination prohibited!)
There are 40 students …
Today’s Action Items
In Class
Merge Team Schedules
Weekly team meeting time
Weekly mentor meeting time
After Class
Hobby Shop
Respond to survey (see mail and on Wiki)
Membership form (take one if needed)
Safety training; Thursday 4:30, Friday 3:00
Meet as a team
Met with your clinician (we send intro mail)
Mentor meetings begin next week
Begin prior art
Fill in the Wiki
Teams
A Remote-Sensing Pulse Oximetry DeviceAbid,AbubakarKaundinya,Pranav R.Zaini,Hesham M.Wu,YuelongMentor: Maggie & Charlie
Allowing two handed endoscopic ear surgeryAbah,Colette P.Buchman,Michael R.Lee,VaniaKim,DonghyunMentor: Nevan
Dental ImplantDeans,Daivon A.Abiose,Kabir O.Vyatskikh,AndreyMiranda-Nieves,Davidvan den Heuvel,Louise E.Mentor: Sandy & Subarna
Development of customized ankle foot orthoticsKu,Stephanie L.Meza,Daniel I.Van Belleghem,Sarah M.Vanegas, MorrisMentor: Subarna w/Brandy Baker
Mallet finger splintBarraza,RaulFalcone,SaraKirkby,Nicholas J.Wilson,Spencer R.Gural,NilMentor: Tyler
Semi-automated tube thoracostomy insertion systemJiang,ShengKojimoto,Nigel CostelloOki,Kristi ElenaZhang,XiangHohmann, AnjaKizilski, ShannenMentor: Tyler
Visually guidable suction catheter and applications in ICUMireault,Alfred N.Aranda-Michel,Edgar C.Eck,Michael B.Haidar, SamerMentor: Nevan (Charlie & Maggie)
Wearable defibrillator for survivors of acute myocardial infarctionHan,BichengEmonds,Alexandriya M.Cui, CherylSivathanu, VivekWhisler,Jordan AriMentor: Maggie & Charlie
Projects not selected:Anti-malarial bednet adherence monitoring in sub-Saharan AfricaAqua RunnersImproved food component delivery