Synergy BIM and Lean Construction

Civil and Environmental Engineering Technion - Israel Institute of Technology

Introduction

LeanConstruction

LeanBIMSynergy

ConclusionsSynergy:

BuildingInformationModelingand

LeanConstruction

Assoc.ProfessorRafaelSacks

BIMHandbookSymposium

GeorgiaTechAtlanta,GA,13th March2008


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Introduction

BothLeanandBIMaredeepprocesschanges,inthinkingandinpractices.Bothrequireconcertedlongtermefforts,withinstablebusinessandworkenvironments

17:50

DesignersManagers

Builders

OperatorsOwners

Users

FinanceCommunity

Government

Subcontractors

Insanity: Doing the same thing over and over and expecting a different result (Albert Einstein)

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

WhatisLeanConstruction?

TheLeanConstructionVision:

.newprinciplesandmethodsforproductdevelopmentandproductionmanagementspecificallytailoredtotheAEC industry,butakintothosedefiningleanproductionthatprovedtobesosuccessfulinmanufacturing.

(fromwww.iglc.net)

Value tobettermeetcustomerdemands Flow AEC processaswellasAEC product RemoveWaste appliestodesign,detailing,supplyand construction

AEC =Architecture,Engineering,Construction

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

ToyotaProductionSystem17:50

4

Standardisedwork

Remove Waste (Muda)

Continuous Flow

Pull system Kaizen -

continuous improvement

Stability

Error-free work

Value


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Variationonsite

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6/42/242/233/43/64/33/53/32/102/93/233/193/93/243/223/213/203/183/173/163/153/132/82/72/62/52/42/3

Sum of workers

Date

Aprts.


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

ImpactofVariation

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17:50

Project managers on high-end projects reported spending up to 60% of their time managing client changes and the resulting complexity of instructions to specialty contractors.

, rise Apartment Buildings-Lean Management Model for Construction of High(2007). , M.,GoldinSacks, R., and 384-, Vol. 133 No. 5 pp. 374Journal of Construction Engineering and ManagementASCE


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

LEAPCON CashFlows

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17:50

$(20,000)

$(15,000)

$(10,000)

$(5,000)

$0

$5,000

$10,000

$15,000

$20,000

0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00

Simulation Time (min.sec)

C

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F

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F': Lean, no customization

F: Lean

A': Conventional, no customization

A: Conventional

LEAPCON Simulationwww.technion.ac.il/~cvsacks/tech-leap.htm

Pull flowMulti-skilling


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

BuildingInformationModelingBuildingInformationModeling(BIM)

Tools,processesandtechnologiesthatarefacilitatedbydigital,machinereadabledocumentationaboutabuilding,itsperformance,itsplanning,itsconstructionandlateritsoperation.

ThereforeBIMdescribesanactivity,notanobject.Todescribetheresultofthemodelingactivity,weusethetermBuildingInformationModel,ormoresimplyBuildingModel infull.

BuildingModel

Adigital,machinereadablerecordofabuilding,itsperformance,itsplanning,itsconstructionandlateritsoperation.

ARevit modeloraDigitalProject modelofabuildingareexamplesofBuildingModels.BuildingModel canbeconsideredthenextgenerationreplacementforconstructiondrawings,orarchitecturaldrawings.

17:50

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

17:50OneIslandEast,Swire,HongKong

Owner

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

BIMBenefits

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Benefit Description

Productivity Reducedesignandengineeringlabor

Quality Preventdesignandcoordinationerrors

Duration Shortendesignduration

Accuracy Heightenaccuracyforallanalyses

Industrialization Producedetailedfabricationdata,increasepreassemblyandprefabrication

Management Improveinformationflow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Pullflowofinformation

LeanandBIMSynergies17:50

Design

Detailing

Construction

Reducedesigndevelopmentcycletime

Errorfreeconstructio

n

Increasedprefabricationandpullof

parts

Manageinformation

flows Standardisedwork

methods

MaintainValue ofInformation

Pullflowdetailing OperateandMaintain

Standardizedwork

methods

Maintaininformationvalue

Pullflowofinformation

Pullflowoflabor

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

BIM model collaborative process

MaintainInformationValue

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17:50

OPERATIONSFEASIBILITY DESIGN CONSTRUCTION

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Time, Project Phase

Traditional single, stage,

paper drawings

Loss of value due to handover,

recreation of information

Retrofit utilizing as-built and existing facility documentation

BIM Handbook, Eastman et al. 2008, John Wiley and Sons.Value

Leanconstructionneed BIMfacility

MaximizeValue toClient Reuseofmodelinformation


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

ReduceDesignCycleTime

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17:50

Cycle Time

80 days

Sacks, R., (2004),

34 days

Evaluation of the economic impact of computer-integration in precast concrete construction, ASCE Journal of Computing in Civil Engineering, Vol. 18 No. 4. pp. 301-312.


ReduceCycleTime Reviewmodelinsteadofdrawings,automaticdrawingproduction


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

ManageDesignInformationFlow

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Continuous Flow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

InformationDevelopmentVelocity17:50

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Using project extranets with building models:

Continuous Flow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

ProbabilityofBottleneck

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Using project extranets:

Leanconstructionneed ITandBIMfacility

Visualization offlow design MonitoringofdesigninformationflowusingBIMandmodelserversorprojectintranets

Continuous Flow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

PullingDetailingInformation

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4D Simulation; Set sequence priority (e.g. walls for medium pressure duct); pull detailing work only when construction approaches

Pull flow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

PullingDetailingInformation17:50

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Clash checking


Pull detailingandfabrication/assemblyofbuildingsystemcomponentsaccordingtoshorttermplans

Collaborativedetailingwithintegrationacrossdisciplines,automatedclashchecking

Pull flow Collaborative

Design


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

StandardizedWork

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17:50

J.W. McCLENAHAN CO.

1. Drawings for each work package generated automatically from the model;

2. Parts fabricated and packaged off-site;3. Installed on site as a package

StandardisedWork


Standardised work Automatedassemblyinstructionsandbillsofmaterial


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

4DModeling,TemporaryFacilities17:50

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Stablework effectiveprojectplanning,predictingproblems,avoidingproblems

4Danimationandmodelingoftemporaryprocessfacilities,errorfreedesignanddetailingError free stable work


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

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Campbell, Architecture Week 2006

IncreasedPrefabrication

Remove WasteQuality

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

IncreasedPrefabrication17:50

Remove Waste

Remove WasteQuality

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

17:50IncreasedPrefabrication

Remove Waste

23


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions


Remove Waste

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions


Remove Waste

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions



Prefabrication removewasteofunnecessaryorinefficientactivities

Accurateerrorfreedetailingforprefabrication

Remove Waste

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Pullingprefabricatedparts17:50

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Leanconstructionneed ITandBIMfacility

PullofmaterialsandKanban signalsforfabrication

OnlinepullofmaterialsandsignalsthroughmanagementinformationlinkedthroughaBIMserver

Pull flow


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

PullingLaborandVisualizingStatus17:50

Pull flow

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Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

PullingLaborandVisualizingStatus17:50

Pull flow

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Pullflowsignalsarenotvisible,likeinmanufacturing,sodirectivestoteamspullwork

Onlinepullflowsignalscanbecommunicatedtoteamsonline

Projectstatuschanges rapidlyandsometimesunexpectedly.Informationiscomplex,diverse,plentifulanddifficulttointegrate

Goodvisualization isneededforconstructionprocessandworkreadinessinformation


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Safety Riskforecastforworkplanning


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

31

17:50


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Safety Riskforecastforworkplanning


Safeprocesses nowaste BIMsupportsdynamicsafetyconsciousplanning


Introduction

LeanConstruction

LeanBIMSynergy

Conclusions

Conclusions

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BIMmakesconstructionleaner;LeanthinkingfocusesBIMimplementation

OwnershaveauniqueroletoplayasleadersofLeanandBIMinitiatives LeanandBIMcanimproveanownersbottomline,butalsohavearipple

effectacrosstheconstructionindustry

To perform lean, BIM-enabled projects ..

.worthy of inclusion as best practice case studies in the 2nd edition of the BIM Handbook !!!

The challenge to all owners, designers, contractors and fabricators:

Synergy: Building Information Modelingand Lean ConstructionIntroductionWhat is Lean Construction?Toyota Production SystemVariation on siteImpact of VariationLEAPCON Cash FlowsBuilding Information ModelingOne Island East, Swire, Hong KongBIM BenefitsLean and BIM SynergiesMaintain Information ValueReduce Design Cycle TimeManage Design Information FlowInformation Development VelocityProbability of BottleneckPulling Detailing InformationPulling Detailing InformationStandardized Work4D Modeling, Temporary FacilitiesIncreased PrefabricationIncreased PrefabricationIncreased PrefabricationIncreased PrefabricationIncreased PrefabricationIncreased PrefabricationPulling prefabricated partsPulling Labor and Visualizing StatusPulling Labor and Visualizing StatusSafety Risk forecast for work planningSafety Risk forecast for work planningConclusions

Synergy BIM and Lean Construction

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