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Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
ConclusionsSynergy:
BuildingInformationModelingand
LeanConstruction
Assoc.ProfessorRafaelSacks
BIMHandbookSymposium
GeorgiaTechAtlanta,GA,13th March2008
Civil and Environmental Engineering Technion - Israel Institute of Technology
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)
2
Civil and Environmental Engineering Technion - Israel Institute of Technology
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
3
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
ToyotaProductionSystem17:50
4
Standardisedwork
Remove Waste (Muda)
Continuous Flow
Pull system Kaizen -
continuous improvement
Stability
Error-free work
Value
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
Variationonsite
5
17:50
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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.
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
ImpactofVariation
6
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
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
LEAPCON CashFlows
7
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
a
s
h
F
l
o
w
F': Lean, no customization
F: Lean
A': Conventional, no customization
A: Conventional
LEAPCON Simulationwww.technion.ac.il/~cvsacks/tech-leap.htm
Pull flowMulti-skilling
Civil and Environmental Engineering Technion - Israel Institute of Technology
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
8
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
17:50OneIslandEast,Swire,HongKong
Owner
9
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
BIMBenefits
10
Benefit Description
Productivity Reducedesignandengineeringlabor
Quality Preventdesignandcoordinationerrors
Duration Shortendesignduration
Accuracy Heightenaccuracyforallanalyses
Industrialization Producedetailedfabricationdata,increasepreassemblyandprefabrication
Management Improveinformationflow
Civil and Environmental Engineering Technion - Israel Institute of Technology
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
11
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
BIM model collaborative process
MaintainInformationValue
12
17:50
OPERATIONSFEASIBILITY DESIGN CONSTRUCTION
V
a
l
u
e
o
f
d
e
s
i
g
n
d
o
c
u
m
e
n
t
a
t
i
o
n
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
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
ReduceDesignCycleTime
13
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.
Leanconstructionneed BIMfacility
ReduceCycleTime Reviewmodelinsteadofdrawings,automaticdrawingproduction
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
ManageDesignInformationFlow
14
Continuous Flow
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
InformationDevelopmentVelocity17:50
15
I
n
f
o
r
m
a
t
i
o
n
D
e
v
e
l
o
p
m
e
n
t
V
e
l
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o
n
D
e
v
e
l
o
p
m
e
n
t
V
e
l
o
c
i
t
y
Using project extranets with building models:
Continuous Flow
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
ProbabilityofBottleneck
16
P
r
o
b
a
b
i
l
i
t
y
o
f
i
n
f
o
r
m
a
t
i
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b
o
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t
l
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c
k
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m
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b
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l
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n
e
c
k
Using project extranets:
Leanconstructionneed ITandBIMfacility
Visualization offlow design MonitoringofdesigninformationflowusingBIMandmodelserversorprojectintranets
Continuous Flow
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
PullingDetailingInformation
17
4D Simulation; Set sequence priority (e.g. walls for medium pressure duct); pull detailing work only when construction approaches
Pull flow
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
PullingDetailingInformation17:50
18
Clash checking
Leanconstructionneed BIMfacility
Pull detailingandfabrication/assemblyofbuildingsystemcomponentsaccordingtoshorttermplans
Collaborativedetailingwithintegrationacrossdisciplines,automatedclashchecking
Pull flow Collaborative
Design
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
StandardizedWork
19
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
Leanconstructionneed BIMfacility
Standardised work Automatedassemblyinstructionsandbillsofmaterial
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
4DModeling,TemporaryFacilities17:50
20
Leanconstructionneed BIMfacility
Stablework effectiveprojectplanning,predictingproblems,avoidingproblems
4Danimationandmodelingoftemporaryprocessfacilities,errorfreedesignanddetailingError free stable work
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
21
Campbell, Architecture Week 2006
IncreasedPrefabrication
Remove WasteQuality
21
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
IncreasedPrefabrication17:50
Remove Waste
Remove WasteQuality
22
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
17:50IncreasedPrefabrication
Remove Waste
23
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
17:50IncreasedPrefabrication
Remove Waste
24
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
17:50IncreasedPrefabrication
Remove Waste
25
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
17:50IncreasedPrefabrication
Leanconstructionneed BIMfacility
Prefabrication removewasteofunnecessaryorinefficientactivities
Accurateerrorfreedetailingforprefabrication
Remove Waste
26
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
Pullingprefabricatedparts17:50
27
Leanconstructionneed ITandBIMfacility
PullofmaterialsandKanban signalsforfabrication
OnlinepullofmaterialsandsignalsthroughmanagementinformationlinkedthroughaBIMserver
Pull flow
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
PullingLaborandVisualizingStatus17:50
Pull flow
28
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
PullingLaborandVisualizingStatus17:50
Pull flow
29
Leanconstructionneed BIMfacility
Pullflowsignalsarenotvisible,likeinmanufacturing,sodirectivestoteamspullwork
Onlinepullflowsignalscanbecommunicatedtoteamsonline
Projectstatuschanges rapidlyandsometimesunexpectedly.Informationiscomplex,diverse,plentifulanddifficulttointegrate
Goodvisualization isneededforconstructionprocessandworkreadinessinformation
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
Safety Riskforecastforworkplanning
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
31
17:50
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
Safety Riskforecastforworkplanning
Leanconstructionneed BIMfacility
Safeprocesses nowaste BIMsupportsdynamicsafetyconsciousplanning
Civil and Environmental Engineering Technion - Israel Institute of Technology
Introduction
LeanConstruction
LeanBIMSynergy
Conclusions
Conclusions
33
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