July 10th 2013: A New Meaning for Building Cost. September 11th 2013: Inverting the Construction Supply Chain ... Customised. Time limited. Risk: human error ...
Welcome to Stimulating BIM seminar series April 24th 2013: Managing what BIM does not do. July 10th 2013: A New Meaning for Building Cost September 11th 2013: Inverting the Construction Supply Chain November 20th 2013: Can Interoperability work with People
BIM: A New Meaning for Building Cost Professor David Boyd Birmingham School of the Built Environment
Seminar 1: Conclusions • BIM Opportunity • Understand information: Perfect but Partial View • Avoid seduction of perfection; Appropriate • Organisational strategy to trust data • Needs sophisticated and active management
MSc Integrated Design and Construction Management People Organisations And People
Design and Construction Processes
Business Management
Do Job Strategic Delivery Project
A critical and active approach to managing the new developments: IPD and BIM
Organisations
Building Information Modelling Management Technology
Supply Chain Integration
Design for FM and Performance
Big questions?
What does our costing mean? Is our costing appropriate?
QS BIM Cost Dalek
The Simple View IFC
Computational Software
API
Geometry Object Attributes
ODBC
Elements
Excel
Quantities
Design Past projects
Quantities Data bases
£
Understand the differences Product model
Cost Model
Production Model
Two Axis of BIM Development Do what is Currently done
Engage
Automate
Do something different
Two Axis of BIM Development Do what is Currently done
Tool for improvement Supports skills Collaboration Customised Time limited Risk: human error
Two Axis of BIM Development Do what is Currently done
Reality Automate
Engage
Software Rhetoric
Government Rhetoric
Rhetoric Do something different
Two Axis of BIM Development Do what is Currently done
Reality Automate
Opportunity Engage •
• Rhetoric
Service
Software
Do something different
Big Question 1
? Can building costing be automated
Quantification The case for BIM • • • • •
Measurement Time consuming Done several times Prone to error Data difficult to manage: structure Changes difficult to manage
Why is construction so difficult to cost • • • • •
Complexity technical interdependence Organisational interdependence Competitive Market; low entry; little control Uniqueness of products Uniqueness of locations
Costing is a Simplification What costing What Future
What is important What can be measured
What calculation
Experience Judgement
Why it works? Design
Estimate
Database
Out-turn
• Learn to work with results • Structure and Procedures = Repeatable • Cope with – Inadequacies – Errors – Mis-use
• Simplification vs complexification
Big Question Is it better to use a simplification that you understand than to use complexification in ignorance?
Understand the differences Product Model
Cost Model Quantities Attributes
Automation =
System Applied Rules
Which apply Where?
Materials Additions not modelled Groupings Interconnections
Labour Rates productivity
Additions Plant Site set up
Auto Checking?
Production Model
Estimator Applied Estimator Checking Rules
BIM Problem • BIM Models simplify problem to model • Then complexify with model details and functionality • The assumption is the model is right and can be used correctly.
Still doing the same thing?
Why Cost? • What decision – – – –
Select tenderer Bid for job Control costs of changes payments
• Accountability: seen to be done
Still doing the same thing?
Does it help us to do job better?
New reasons to cost • • • • • • • •
Change and improvement Target cost driven design Target value driven design Lean production Supply chain development Social value enhancement Cost of operation Building performance
Cost methods • • • •
Activity based costing Transaction costing Supply chain costing Social value accounting
Help us to do job better!
The Greater Case for BIM
integration
detail
PAS1192 ‘complete’ view
A Territory of Costings Guarantees warranties
Asset business
Environment disposal
Residual
finance
maintenance
running remediation
demolition Social Value
refurbishment Process improvement
land Legal
What is the value of operating my building asset?
7 Dimension Cost Accountant • • • • • • •
Drives BIM to deliver results Uses Multiple costing methods Understands assumptions in costing Applies costing to decisions Health check on costings Engages stakeholders in costs Develops new approaches
Conclusion • • • • • • •
BIM challenges: why and way Decision support: Cost to improve Do costing differently and more Costing is a simplification; Automation limited Need cost checking function Better engagement
Welcome to Stimulating BIM seminar series April 24th 2013: Managing what BIM does not do. July 10th 2013: A New Meaning for Building Cost September 11th 2013: Inverting the Construction Supply Chain November 20th 2013: Can Interoperability work with People
