Deterministic Design Process - Massachusetts Institute of ...web.mit.edu/2.75/lab/Deterministic...

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!


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


DesignParameters


Removesplaque

Solvent

Mechanical

Concentration TimePressure

MSDS

Betweenteeth access

DepthWidth

Wand Oral cavityHand size


Counter spaceUser studies

Consumable Cost / use Chemicalformulation

Shelf Life

SafeIntuitive

TimersPressure limits

… …

Example

Chemical

Thermal

Mechanical

StrategyConcepts


More AnalysisPrototyping

CAD

Discovery Design Development


ForcePressure

FlowViscosity

Dwell

Safety!ChemistryStability


DesignParameters


Removesplaque

Solvent

Mechanical


MSDS Poison/Burn

Abrasion

Concentrationvs. timeLimit pressure

Betweenteeth access

DepthWidth

FluidMechanics

“Frank White”



Unwieldy


Visit a shop Shelf life

SafeIntuitive

TimersPressure limits

User Guide

Example

Chemical

Thermal

Mechanical

StrategyConcepts


MCM

Supporting Modules


CAD

Design

Discovery Design Development


ForcePressure

FlowViscosity

Dwell



DesignParameters


Removesplaque

Solvent

Mechanical


MSDS Poison/Burn

Abrasion

Concentrationvs. timeLimit pressure

Betweenteeth access

DepthWidth

FluidMechanics

“Frank White”

Damage to gums

…

Wand Oral cavityHand size

HumanFactors

“Measureof a Man”

… …



… Unwieldy Retracting Cord


Visit a shop Shelf life Sealed, QR cartridges

SafeIntuitive

Timers … AAMI/HE75 … User Guide…

Example

Chemical

Thermal

Mechanical

StrategyConcepts


MCM

Supporting Modules


CAD

Design

Discovery Design Development Building & Testing


ForcePressure

FlowViscosity

Dwell


• 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)

http://web.mit.edu/2.75/lab/assignments.html

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

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

Deterministic Design Process - Massachusetts Institute of ...web.mit.edu/2.75/lab/Deterministic...

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