t h e t r u s t e d n a m e i n m e a s u r e m e n t

Is Construction Verification

The missing link in the BIM chain?

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Presenters:-

Michael Johnson

Senior BIM Consultant MJohnson@plowmancraven.co.uk

+44 (0)7802 865554

Shaun Farrell

Associate Director shaun.farrell@turntown.co.uk

+44 (0)20 7544 4000

Paul Thorpe

BIM/VDC Coordinator Paul.Thorpe@brookfieldmultiplex.com

+44 (0)7525 805781

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Agenda

• History

• BIM

• Consequences

• Construction Verification

• Benefits

• Construction Verification …… A Contractors Perspective

• Construction Verification ……. A Project Managers Perspective

• Questions

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Plowman Craven…..

■ 50th Anniversary

■ Work across all sectors of AECO Market

■ Technical innovators

■ Delivery capability across multiple platforms

■ 200 plus permanent staff

■ First adopters of laser scanning in the UK

■ 12+ years laser scanning experience

Clear Edge Technical and Application Partner - Europe

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Construction Yesterday

■ Visionary Clients

■ Great Concepts

■ Great Engineering

■ Eventual Delivery

BUT

■ Labour Intensive

■ Dangerous Working Environment

■ High Risk

■ Cost Challenges

■ Supply Chain Challenges

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Construction Today

■ Visionary Clients

■ Great Concepts

■ Great Engineering

■ Eventual Delivery

BUT

■ Labour Intensive

■ Dangerous Working Environment

■ High Risk

■ Cost Challenges

■ Supply Chain Challenges

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Is this what we are trying to achieve?

Structure

CDE

Architect MEP Infrastructure

Federated, clash managed

Digitally Marked up

Issued to CDE

Construction Sequencing

Change Management

Structural Fabrication

Model Manufacturing

MEP Model

Quantity Take Off Estimates &

BOQ’s

Model Review

Construction BIM

Operation

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We are trying to provide better

Healthcare Housing Education

Infrastructure Commercial Leisure

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BIM 4 Design

• EIR

• AIM

• Design BEP

• LOD/LOI

• Federated Design Models

• Clash Managed

• Audited for purpose

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BIM 4 Construction

• EIR

• AIM

• Construction BEP

• LOD/LOI

• Clash Managed

• Audited for purpose

• Federated Sub - contractor Models

• 4D and 5D Activities

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BIM in reality

• Design BIM sorted in a digital environment

• Construction PIM sorted in a digital environment

• Digital environment to construction site is sometimes still a

challenge!

• Do always get what we expected?

• How do we validate work done?

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Possible Consequences of WIP

• Right element in wrong place

• Wrong element in wrong place

• Out of tolerance installation

• Knock on effects to following packages

• Package creep

• RFI’s

• Sub contractor Delays

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Where is the Construction Verification Value ?

In addition to the contractual obligations surrounding the positional

and content verification of an installation, what would be the

commercial value of having “documented independent certification’ of

the positional accuracy and content of installations?

Could Construction Verification play a part in mitigating some of

the ever present costly delays, RFI’s, package creep, re-works,

legal and financial variations that play a part in our current

process?

Could Construction Verification add clarity to stage payments to

Contractors for work successfully carried out?

Could a reduction in contingency influence tender return prices

and impact on work won ratios’

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Benefits

• Validate constructed work delivered against design

• Early recognition of possible re-work

• Apportionment of financial responsibility

• Assistance with site monitoring against program

• Assistance with Site Progress Reports against invoicing

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Case Study

Objective:-

‘The purpose of the project was to verify that the steel work

construction on the Project was within 25mm tolerance of

the design, and that it included the penetrations required

when federated with the steelwork model.’

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Workflow used

• Building was laser scanned and photographed

• Scans processed in Cyclone

• Data converted to Recap (rcs) file format

• Data was aligned to Site Coordinates

• Point Cloud federated into PIM

• Verification carried out within Navis

• Report complied

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Deliverables

Commissioned deliverables:

• RCS file

• Construction Verification Report

• 2D CAD outputs

• Visual presentation

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Financial Value of Construction Verification

• In general, horizontal position of major steel structure

(columns and beams) was within tolerance in the

East/West direction, but deviates in North/South as

illustrated in CAD outputs

• 9 instances of other discrepancies, including penetrations

are illustrated in the report

Discrepancies

Identified

Indicative RFI

Cost

Possible Project

Cost / floor

9 £5000 £45,000

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The challenge ……. adoption

■ Should we do it?

■ Who pays?

■ When do we do it?

■ Where is the benefit?

■ Should it be a line item within a BEP?

■ Can it help address LOD500?

Let’s ask the experts!

Why would a contractor benefit from

construction verification?

• Present day potential savings

• Why construction verification is becoming more

important

• Where the industry is heading (Level 3 BIM)

Scenario – Trade on Trade Handover

Subcontractor 1 completes work

Subcontractor 1 employs surveyor to validate works

and produce as-builts

Area is handed over to Subcontractor 2

Subcontractor 2 employs surveyor to check works are

within defined tolerances

Subcontractor 2 accepts / refuses area SAME WORK TWICE!

What’s wrong with this picture?

An independent certified project partner

Responsible for

Project surveys,

Construction verification,

Producing the as-built information

How is this paid for?

Part of the project prelims

Subcontractors scope to undertake surveys removed

Possible Solution

Increasing design complexity

Interlace - Singapore

Through use of 3D design and analysis tools

How to combat increased design complexity?

Established Understood Delivering benefits

Clash Detection

Tolerances

Deflections

Settlement

What about on site?

importance of construction verification

design

complexity

Point Clouds

How to provide better as-built information

Greater understanding

of the as-built condition

Review in 3D the impact

to follow on trades

Improved accuracy 1:1

Continuous monitoring

How to provide better as-built information

Reliability

Deflections / Settlement throughout project duration

An as-built today is less reliable in 3 months

BIM Level 3

BIM Level 3 during the construction phase?

An updating digital record

of the project during the

construction phase

Frequent / constant

recording of as-built

conditions

Smart sensors recording

condition data, such as

concrete strength

Allowing all parties to

review real time

Current conditions used to inform up-coming works

Checking construction methodology / programme using real time information

Site personnel safety briefings showing real time working areas and routes

Remote senior staff reviews of progress, safety, quality etc.

How will this information be used?

Extreme 4D

Technology?

Process?

Contractual

Information needs to be:

• Trusted

• Useable

• Available

Barriers?

Dr. Ionnis Brilakis –

Laing O Rourke Lecturer in Construction

Engineering Cambridge University

Where will this lead to?

“As-is BIM”

Utilising technology such as:

• Cloud computing

• Scan to BIM

• Big data

• Internet of things

Smart sensors capturing physical and

non-physical data throughout lifecycle of

the asset

making the difference

Verification

Shaun Farrell – Associate Director

18 July 2016

Turner & Townsend

Who we are

Turner & Townsend is an independent professional services company specialising in programme management, project management, cost management and consulting across the property, infrastructure and natural resources sectors.

With 90 offices in 38 countries we draw on our extensive global and industry experience to manage risk while maximising value and performance during the construction and operation of our clients’ assets.

Our vision

To be the leading capital programmes professional service provider operating across property, infrastructure and natural resources.

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Our services

Operations

Maximising asset portfolio

performance

Environmental assessment

Facilities management

Health and safety

Legislative compliance

Life cycle costing, carbon and energy management

Operational cost management

Operational performance improvement

Consultancy

Improving programme performance

Asset strategy and planning

Business case development

Change management

Funders advisory services

Organisational design

Performance improvement

Procurement and supply chain strategy

Risk and opportunity management

Delivery

Managing programme delivery

Contract and dispute management

Cost engineering and cost management

Design management

Portfolio management

Procurement

Project controls

Project management

Project monitoring and audit

Planning and scheduling

Risk mitigation

Combining skills, delivering programme results

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Technology Team

Capital Projects

We manage the delivery and integration of Technology Solutions into existing and new builds

■ KPMG

■ PWC

BIM

We work with our clients to define their information requirements and assure these are met though management and validations processes to create a digital asset

■ Battersea Power Station

■ Grosvenor Square

Analytics

We get clients to understand their business better by helping them analyse and use their data in an effective way. We do this using interactive & visualization tools

■ NHS

■ Zurich

Solutions Advisory

We provide consultancy and information management solutions to our clients to support their objectives

■ United Utilities

■ Tramlink

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Data is Brutal

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Management

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PROGRESS

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Progress and verification

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ASSEMBLY

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Coordination & off site manufacturing

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3D modular riser to installation

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Riser installation

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TRUST BIMnet - Verification

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Gate process - Verified

• The transition from published to archive

• Archived at key project milestones and project completion

• Re-measured and verified as built

Image ©Mervyn Richards

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Gate process - Archived

• Used to record all progress as each project milestone is met

• Hold a record of all transaction and change orders

• Re-measured as built/as constructed and verified information

• Asset data

• Health and safety file

• Operations & maintenance information

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Turner & Townsend Management Solutions Limited One New Change London EC1M 9AF

t: +44 (0)20 7544 4000 e: shaun.farrell@turntown.co.uk www.turnerandtownsend.com

© Turner & Townsend Project Management Limited. This content is for general information purposes only and does not purport to constitute professional advice. We do not make any representation or give any warranty, express or implied, and shall not be liable for any losses or damages whatsoever, arising from reliance on information contained in this document.

It must not be made available or copied or otherwise quoted or referred to in whole or in part in any way, including orally, to any other party without our express written permission and we accept no liability of whatsoever nature for any use by any other party.