PowerPoint Presentation

MY Lean + BIM JourneyNathan Wood, Chief Enabling Officer

@nathancwood

@SpectrumAEC

Boulder, COAustin, TXSan Francisco, CA

Falls Church, VA

The Journey to DPR Construction & BIM

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BIM Research Assignment: Abu Dhabi

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DPR Consulting: Implementing 5D Collaboration

We.Build.People.

SpectrumAEC Drives the Development of Digital Project Standards that Balance the Needs of People, Process, & TechnologyMission

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WHATHOW

WHY?

The BIM Implementation JourneyBIM DefinitionUS National BIM Standard v1, 2007 A digital representation of physical and functional characteristics of a facility. A BIM is a shared knowledge resource for information about a facility forming a reliable basis for decisions during its life-cycle; defined as existing from earliest conception to demolition.3D4D5D6DXDLOD

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SUTTER CASTRO VALLEY

WHY: Sutter Health + OSHPD State Requirements

Seismic Fault LinesSan Francisco Bay, CA

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Structure & Faade Coordination

WHAT: Detailed BIM of Structure & Faade

Concrete shear walls along perimeter on L1-3Congested reinforcing in boundary elements500 wall embeds and penetrations for precast

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30% Reduction in ScheduleNo Rework(MEP)As-Built ModelIncrease Field Crew Production

HOW: BIM + Lean + Integrated Project Delivery

3D Detailing and Coordination in TeklaShop Drawing Generation is Direct Output from Tekla Model

BIM Use: Direct 3D to 2D Field Drawings

The First Discovery: Rebar vs. Precast Sleeve200+ Facade penetrations or embed were coordinated with rebar and MEP. Precast subcontractor did not originally account for rebar spacing during design.Over 25% of Connection designs were changed due to BIM Coordination

BIM Use: Precast Faade Connections

BIM = Better Productivity & Quality

Benefit: Quality Control + Increased ProductivityDPR Concrete reported 10% Productivity Increase from BIM shop drawings process.

ArchitectDesign Assist

3D ModelDesign DrawingsShop DrawingsCommentsPermit

Lesson Learned: Design Assist Permit Process

A Coordinated BIM is only as valuable as the deliverable that it produces!Design Drawings?=?

Shop DrawingsThe Question Becomes

Risk: Design to Fabrication Reliability

How do you check?

Countermeasure: 2D Fabrication to BIMDesign Assist Subcontractors Provided CAD to Align in Tekla

From 2D Shop Drawings..

From 2D to 3D BIM .. Not Lean, but Effective!

Precast 2D ElevationElevation in Fab Model

BIM Use: Complex Detail Coordination (BIM + IPD)

Coordinated in the Model

Revised Shop Drawing

Benefit: BIM to Fabrication Reliability

BIM Use: 2D Detail Constructability Review

Tapered Roof Insulation

BIM Use: Podium Roof Design CoordinationOSHPD requires minimum distance between roof penetrations 30+ locations where tapered insulation fell above kicker connectionsOPTION #1: Spend $50K + schedule delay to move existing screen posts

BIM + Lean: Last Responsible Moment

OPTION #2: Roof Slope redesigned 4 weeks prior to roof concrete pourRequired 3 new drains to be coordinated with existing MEP BIM

Trust: constructability input

HOW: Shared Risk & Reward with MEP TradesRouted 3 additional drains to a nearby riser in BIMNew drainage calculation of the redesigned slopingConfirmed LEED requirements of roof still heldPoured concrete roof slab on schedule

Trust: Trades install from bim

BIM Use: Automated Spool Fabrication from BIMCourtesy of McClanahan Plumbing

Synergy: Bim + total station

BIM Use: Integrated Total Station LayoutUse of Robotic Total Station (RTS) in Conjunction with Coordinated MEP Inserts in BIM4X Productivity Compared to Conventional LayoutCourtesy of McClanahan Plumbing

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Drywall Spool Sheets Direct from Coordinated BIMTrust: improved framing process

BIM Use: Drywall Framing Productivity & ReworkCredit: DPR Drywall

50-95%Reduction in Rework

Benefits: Installation Metrics (Castro Valley)5-28%Increase in Productivity

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SUTTER CASTRO VALLEYSUTTER ALTA BATES

Fall 2010: Transferring Lessons to Alta Bates

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New Project, New Risks: Sutter Alta Bates

Complex Project SiteUnforseen Conditions

Level 5Level 1Ground LevelLower Level Level 2Level 3Level 420+ Connections to 5 existing structures on 7 levelsSeismic Expansion Joint Connections

BIM Use: Modeling of Temporary Structures

Rebar Scope Gap:Tower Crane AnchorTower Crane Design:Height Requirement & Radius Limits

BIM Use: Faade Constructability Comments

Visual Pour Planning

BIM Use: Concrete Planning & Layout

Enhanced Concrete Lift DrawingsTotal Station Layout Integration

Project Challenges

Risk: BIM vs. Field Reliability

?=?

Robotic Total StationBetter for model vs. field comparison of large areas/entire site

Countermeasure: Digital As-BuiltingBetter for specific points (end of wall, bottom of door threshold, etc)

Laser Scanning

Courtesy of Trimble Navigation ltd.

BIM Use: Modeling of Unforseen Conditions

As unforseen conditions were discovered, trimble total station was used to document as-built location of obstructions, so that we could bring them into the model to see what future construction it would impact34

Design allows for maximum 3 tolerance for placement of pilesAs-Built pile layout showed deviations up to 12 in more difficult locations

Risk: Misplaced Piles & Rebar Design Changes

Robotic Total Station points were captured immediately following pile placement to early identify misplaced piles and begin design change and approval process

Within ToleranceOut of Tolerance Change in RebarOut of Tolerance No Rebar Changes

BIM Use: Digital Check for Deviations

BIM Use: Coordination of Rebar & Structural Steel

2D constructability markup

Steel Plate Penetrations Aligned with new Rebar Design

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The Process

Lean Innovation: Cloud Rebar Submittal Reviews

Cloud Comment Responses = No Resubmittal

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BIM Use: Macro 4D Visualization of Trades

Pour Concrete Basement Walls

Erect Steel Frame

Follow behind with Concrete Core Walls

BIM Use: Micro 4D Constructability Analysis

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4D Clash: Welding Access

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4D Clash: Welding Access

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Form 2x2 opening in wall for welding accessLeave out section of wall prior to steel

Communicate Design Changes in BIM

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Patch opening after welding complete

Communicate Design Changes in BIM

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Pour section with core wall

BIM Enabled Design Change Approvals

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Risk: Civil/Structural Design Coordination

BIM Use: Overlay of Revit Structure & Civil 3D

Countermeasure: Define Rebar Design in BIM

Pull 2D Detail from BIM for OSHPD Drawing

Integrate x,y,z Total Station Layout from BIM

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Success Metric: Early Schedule SavingsConcrete Foundations31 DaysOf Critical Path Schedule Recovered over 10 Months

33% Time Savings Per Submittal Review

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A Tale of Two Projects: IPD Lessons LearnedCastro Valley Delivered6 WeeksAhead of ScheduleMaintainedTarget Cost

Alta Bates Delivered6 MonthsBehind Schedule20 Million Over Target Cost

BIM?

IPD?LEAN?

The Castro Valley Difference: CultureTeam members chorus: Dont try this with strangers. Expect lengthy contract negotiations and endless meetings. Get ready to open your books. Be patient. Prepare for culture change and new work flows. Be vigilant about communicating.The actual effort required was underestimated on both the design and construction sides, says James Mobley, a Devenney principal. We had to make adjustments some were painful, he adds. Still, he refers to the project as a phenomenal adventure.

The Tipping Point of BIM Value Starts with.

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Design Model vs Construction Model

Composite OverlayDesign ModelFabrication Model

Reactive Quality Control of Design Hanoff

Exposed Areas of Poor Communication

TOOLShifting the industry paradigm PEOPLEPROCESSBIM is just a Tool1This Tool is only as good as the People using It2The People can only be aseffective as the Process allows them to be3

The Role of BIM in Design & Construction

TRAINER NOTE:We are shifting our mindset away from the notion that everyone needs to know everything about BIM. Instead, we should be thinking about BIM as a Construction Tool that needs to be used by the right people at the right time to input construction knowledge into the model. And we need to make sure that our BIM processes are aligned with our current roles, so that it doesnt create additional work.

ADDITIONAL INFO:Bullet point 3 can seem controversial at first. What were trying to say is that a poorly planned process (or no process at all) can limit a persons ability to perform regardless of experience, talent, knowledge, etc.Example: Navisworks is a particular BIM tool. If I were an expert at using Navisworks, but had no idea how to apply that to coordinating building systems my skills would be useless. The process can be make or break.60

Christian, D., Bredbury, J., Emdanat, S., Haase, F., Kunz, A., Rubel, Z. and Ballard, G. (2014). Four-phase project delivery and the pathway to perfection. In: Proc. 22nd Ann. Conf. of the Intl Group for Lean Construction, IGLC-22, Oslo, Norway, June 25- 27. Available at

Trust in BIM Starts with Lean Handoffs

3D Model2D Drawings

Designer

Detailer

DesignFabrication

Contractor

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Challenge: BIM Handoffs in the Real World

Animation describes the current process from a designer revit model to flattened 2D drawings for steel fabrication.62

Does this..

Equal this?

Design ModelFabrication Model63

Risk: Loss of Reliable BIM for Coordination

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Risk: BIM Coordination Sequence & LOD

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3D Model2D Drawings

Designer

DetailerDesignerDetailer

Beware.65

Risk: New Process, Old Contract?

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Virtually everyone in the construction supply chain works on contracts where the incentive is to maximize their gain at the expense of others

Macomber, John D. 2003 ASCE Report: Follow the Money: What Really Drives Technology Innovation In Construction

Root Cause Analysis: Contract Incentives

Result: Insufficient Funding for Technology3.3%Cross-Industry Average3.3xInvestment Gap

Are we ripe for disruption?Its more likelythat new firms with new business models and new areas of focus will leverage the financial and technological innovations that will change the nature of competition -Clayton Christensen, 1997

The Future of BIM Adoption in USAIPD Contract Relationship -Design-Build Contract Structure -

?=?

BIM-CentricData-Centric2012201669

The Language of BIM has Evolved

Data Centric

Integration Brings Efficiency & Reliability

Drawing CentricTaskCentricBIMCentricTime CentricMedia Centric

Integrated BIM Requires Integrated Data

Where is Brazil along the BIM Hype Journey?

Integrated BIM is Our Most Valuable Tool

Key Factors Impacting Poor Cost & Schedule [McKinsey]Poor OrganizationMissed ConnectionsInadequate CommunicationPoor Short Term PlanningFlawed Performance ManagementInsufficient Risk ManagementContractual MisunderstandingsLimited Talent Management

Lack of Technology isnt the Root Cause

It Starts with the Right People in the Right Place

Efficient Data CaptureReliable Data Analytics

Solving the BIM + Lean Dilemma

ProfileLocationSheet A232BCreation DateStatus Data

AssessAlignAdvance

Adoption of BIM Requires Early Input

Profitable BIM Requires a Balance Between

BIM & Data StandardsAligned Purpose & BehaviorsLean Process Innovation

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Good Luck on Your Lean + BIM Journey!Questions? Comments?

@nathancwood

@SpectrumAEC

Nathan C. Woodwww.nathancwood.comnathan@spectrumaec.com

www.SpectrumAEC.com1 (877) 399-3468

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