CE Introduction

7/27/2019 CE Introduction

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MAKMAK568568E:E: CECE

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CONCURRENT ENGINEERINGCONCURRENT ENGINEERING

IntroductionIntroduction:: major conceptsmajor concepts

WhyWhy concurrentconcurrent engineeringengineering??

MathematicalMathematical modelmodel for design andfor design andmanufacturingmanufacturing

Serial engineeringSerial engineering vs. concurrentvs. concurrent engineeringengineering

BenefitsBenefits of concurrentof concurrent engineeringengineering

CharacterizationCharacterization of concurrentof concurrent engineeringengineering

systemssystems Framework for integrationFramework for integration of lifeof life--cycle phasescycle phases inin

aa CECE EnvironmentEnvironment

Quality function deploymentQuality function deployment


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Produt Life SpanProdut Life Span


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Concurrent (Simultaneous) engineeringConcurrent (Simultaneous) engineering is theis the

systematic approach to the integrated,systematic approach to the integrated, concurrentconcurrentdesign of products and their related processes, includingdesign of products and their related processes, including

manufacture and support.manufacture and support.

This approachThis approach (CE)(CE) is intended to cause the developers,is intended to cause the developers,

from the outset, to consider all elements of the productfrom the outset, to consider all elements of the product

life cycle from conception to disposal, including quality,life cycle from conception to disposal, including quality,

cost, schedule, and user requirements.cost, schedule, and user requirements.

CECE is a management and engineering philosophy foris a management and engineering philosophy for

improving quality and reducing costs and lead time fromimproving quality and reducing costs and lead time from

product conception to product development for newproduct conception to product development for new

products and product modifications.products and product modifications.


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CECE can be seen as the implementation arm of the total qualitycan be seen as the implementation arm of the total quality

management (TQM) and a modern treatment of systemsmanagement (TQM) and a modern treatment of systems

engineering that combines quality engineering methods in aengineering that combines quality engineering methods in a

computer integratedcomputer integrated environment.environment.

Principal focus of CE:Principal focus of CE:

Accelerating timeAccelerating time--toto--marketmarket

Flexibility inFlexibility in

**

equipmentequipment

(with quick change(with quick change

--over)over)

** reducedreduced lot sizeslot sizes

** minimizingminimizing inventoriesinventories

** simplifyingsimplifying designdesign

SurveysSurveys say:say: ReductionReduction in product development time:in product development time: 3030--7070 %%

ReductionReduction in # of engineering changesin # of engineering changes:: 6565--9090 %%

ReductionReduction in timein time--toto--market:market: 9090 %%

ImprovementImprovement in quality:in quality: 200200--600600 %%


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SequentialSequential vs. Concurrentvs. Concurrent EngineeringEngineering

SequentialSequential ((SerialSerial) engineering) engineering isis characterized by departments supplyingcharacterized by departments supplying

information to design onlyinformation to design only aa productproduct hashas been designedbeen designed,, verified andverified and

prototypedprototyped..

Various functionsVarious functions ((designdesign,, manufacturingmanufacturing,, customercustomerservice)service) are separatedare separated..

Information flowsInformation flows inin succession from phase to phasesuccession from phase to phase..


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SequentialSequential vs. Concurrentvs. Concurrent EngineeringEngineering

InIn concurrent engineeringconcurrent engineering all functional areas are integrated with theall functional areas are integrated with the

design processdesign process..

During the design processDuring the design process, CE, CE drawsdraws onon various disciplines to trade offvarious disciplines to trade off

parameters suchparameters such asas manufacturabilitymanufacturability,, testabiility and serviceabilitytestabiility and serviceability,, alongalong

with customer performancewith customer performance , size,, size, weight and costweight and cost..

The information flowThe information flow in CE isin CE is interlinked with various phasesinterlinked with various phases


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TeamTeam

CommunicationsCommunications


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WhyWhy ConcurrentConcurrent

EngineeringEngineering??

Significant cost is committed during the design stage.

Improvements in: 1. Development and production lead times

2. Measurable quality improvements

3. Engineering process improvements

4. Cost reduction

CE is a concerted

effort to integrate

fully design,

analysis and

engineering

functions of

products and

processes.


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LifeLife--CycleCycle

CostsCosts


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ProductProduct LifeLife--CycleCycle

ActivitiesActivities


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BenefitsBenefits of CEof CE

AA high qualityhigh quality--low cost product that meetslow cost product that meets

customer requirementscustomer requirements

AA decreasedecrease inin overall product develeopmentoverall product develeopment timetime

ImprovedImproved timetime--toto--marketmarket

Higher sales and profit with increased varietyHigher sales and profit with increased variety

Lower capital equipment costsLower capital equipment costs

Greater useGreater use ofofautomationautomation

Less chanceLess chance ofofredesignredesign

Few parts from fewer vendorsFew parts from fewer vendors

Better factory availabilityBetter factory availability


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How?: CharacterizationHow?: Characterization ofofthethe CECE EnvironmentEnvironment

TopTop--down design approachdown design approach

Strong customer interfaceStrong customer interface

Multifuctonal and multidisciplinary teamsMultifuctonal and multidisciplinary teams

ContinuityContinuity ofofthe teamsthe teams

PracticalPractical engineeringengineering optimizationoptimization ofof

productproduct//process characteristicsprocess characteristics

Design benchmarking and prototypingDesign benchmarking and prototyping

Testing to confirm highTesting to confirm high riskrisk productionproduction Early involvementEarly involvement ofofsubcontractors and vendorssubcontractors and vendors

Continuous improvement and lessons learnedContinuous improvement and lessons learned..


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How to designHow to design a CE programa CE program

PhasePhase--1:1: IdentificationIdentification ofofInfluencing dimensions and their levelsInfluencing dimensions and their levels

Identify the products and programs that influence theIdentify the products and programs that influence the CECE approachapproach..

Establish the levelsEstablish the levels ofofinfluencinginfluencing dimensionsdimensions onon individual basisindividual basis

using informationusing information onon the product featuresthe product features,, product dimensions andproduct dimensions and

other aspectsother aspects,,

EstablishEstablish anan aggregate level by considering relative importanceaggregate level by considering relative importance ofofinfluencing dimensionsinfluencing dimensions..

PhasePhase--2:2: IdentificationIdentification ofofCECE elements and their levelselements and their levels

Identify theIdentify the CECE elements and subelements including their levelselements and subelements including their levels..

PhasePhase--3:3: EvaluationEvaluation

Determine the improvements that are needed to match the requiredDetermine the improvements that are needed to match the required

levelslevels ofofCECE elementselements..


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CECE InfluencingInfluencing DimensionsDimensions


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Organizational ElementsOrganizational Elements


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Requirement ElementsRequirement Elements


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Communication ElementsCommunication Elements


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Methodology ElementsMethodology Elements


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Difficulties associated withDifficulties associated with CECE

CharacteristicsCharacteristics ofofthe design processthe design process::

The design process itself needs toThe design process itself needs to bebe divided into phasesdivided into phases

((stepssteps)) which leads towhich leads to suboptimizationsuboptimization and the overalland the overall CECE

problemproblem maymay bebe ignoredignored..

Volume and varietyVolume and variety of lifeof life cycle knowledgecycle knowledge::The inclusive qualitative and quantitative knowledge aboutThe inclusive qualitative and quantitative knowledge about

designdesign,, manufacturingmanufacturing,, manfgmanfg.. controlcontrol,, testingtesting,, servcingservcing,,

redesignredesign isis voluminousvoluminous..

SeparationSeparation of lifeof life--cycle functionscycle functions::

LifeLife--cycle functionscycle functions ((designdesign,, manufacturingmanufacturing,, manfgmanfg.. controlcontrol,,

testingtesting, servicing,, servicing, redesignredesign)) are often separatedare often separated inin the firmthe firm

organizationorganization..


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IntegrationIntegration of lifeof life--cycle phasescycle phases in a CEin a CE environmentenvironment

AnAn exampleexample


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ToolsTools of CEof CE

Quality function deploymentQuality function deployment (QFD)(QFD)

Taguchi methodsTaguchi methods ((robust designrobust design))

Failure modes and effectsFailure modes and effects analysis (FMEA)analysis (FMEA)

Design for ManufactureDesign for Manufacture DesignDesign for Assemblyfor Assembly

Axiomatic designAxiomatic design

BoothroydBoothroyd && Dewhurst methodDewhurst method

ComputerComputeraided design for manufactureaided design for manufacture

Value engineeringValue engineering

Group technologyGroup technology

......


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CE Introduction

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