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5D BIM: Today’s Workflow for Cost Certainty
3rd Annual BIM Summit
Sydney 26th August 2013
Discussion
 How Uncertain are Construction Costs?
 What Level of Certainty can be Achieved?
 How do I Create Savings?
 What Skills does a 5D QS need?
 5D BIM Execution Plan
 Deliverables SCUH
How Uncertain are Construction Costs?
How Uncertain is the Market?
Research by Evans & Peck, University of Melbourne (2009)
• Victorian alliance projects
• Average cost increases:
• Business Case v TOC +35 - 45%
• TOC v Final Cost +5 – 10%
Research by Flyvbjerg et al (2003)
• 258 projects in 20 nations
• 90% of projects had cost overruns
• Average cost increase +28%
Source: “In Pursuit of Additional Value” - Evans & Peck + The University of Melbourne,Oct 2009
: http://maxwellsci.com/print/rjaset/v5-2621-2629.pdf
Source: Mitchell Brandtman
MB Brisbane - Financier Watching Brief
1,100 Private Sector Financed
Projects:
• Procurement Type:
• 64% Lump Sum
• 17% Owner Builder
• Project Type:
• 54% Residential
• 16% Industrial
• Cost Overruns:
• Range -13% to +321%
• 1 in 4 Projects > +5%
-25.0
0.0
25.0
50.0
75.0
100.0
What Level of Cost Certainty can be Achieved?
Structural Steel Shop DrawingsStructural Steel Fabrication & Erection
Final Costs & Time – Structural Steel v Entire Contract
% Change
Entire Contract:
Extensions of Time (38 No) + 57%
Variations (321 Claims) + 27%
Structural Steel Component
(15%):
Extensions of Time (zero) + 0%
Variations (5 Claims) + 2%
Source: Mitchell Brandtman
How do I Create Savings?
Head Contractors v Sub Contractors
83.0% Subcontract
14.0% Head Contractor -
Preliminaries
1.2% Head Contractor -
Overheads
1.8% Head Contractor -
Profit
15%
Profit
68% Labour &
Materials
Source: Mitchell Brandtman
Who Owns the Savings?
Source: Mitchell Brandtman
Designer Owner
D&C
Contractor
D-B-B
Contractor
D&C
Subcontor
D-B-B
Subcontor
LOD 100 CONCEPT DESIGN
Functional efficiency
Mass and form optimisation
LOD 200 SCHEMATIC DESIGN
Design workflow efficiency
Alternative methods & systems
LOD 300 DEVELOPED DESIGN
Design workflow efficiency
Alternative materials & products
Accurate contract documents
LOD 300 "FOR CONSTRUCTION"
Accurate "for construction" documents
VDC - Construction scheduling, operations &
LOD 400 CONSTRUCTION
Administrative workflow efficiency
Site efficiency
Risk reduction
LOD 500 OPERATION
Administrative workflow efficiency
Materials & equipment optimisation
PHASE & SAVING TYPE
SAVING OWNERSHIP
headcontractlet
subcontractlet
White No ownership
Red Low ownership
Orange Medium ownership
Yellow High ownership
Green Complete ownership
Design & Bid Pre-Construction (1 month) Construction
Arch
LOD 300
Struc
LOD 300
QS
Model
Map
MEP
LOD 200
4D Info
5D
Info
MEP
LOD 300
Steel
LOD 400
Prefab
LOD 400
4D
Time
5D
Costs
Designers -
Coordination &
Clash
Builder -
Coordination,
Clash, Activities &
Rates
StartConstruction
For
Tender
Federated
Model
For
Construction
Federated
Model
Plan to Build & Nominated SC
SelectPreferredBid
Lean Construction & BIM
• Waiting – for materials or specifications
• Over Production – producing more than is required
• Rework – any work that has to be rectified
• Inventory – too much or too little inventory
• Transportation – double handling and moving equipment or materials
Source: "Recommended Practices for the Application of LEAN ConstructionMethods to
Building New Australian LNG Capacity"by Engineers Australia (Western Australia
Division)
What Skills does a 5D QS need?
Pulling Information
Improve Information – No need for QSID or Codes
Add Parameters
Mapping – BQ Level of Detail
Pushing Information & Round Tripping
Negotiations & Price Transparency
• Revised
• New
• Deleted
Revisioning
• Revised
• New
• Deleted
5D BIM Execution Plan
BIM Execution Plan
Sunshine Coast University Hospital
Deliverables - Revisioning
• Revised
• New
• Deleted
Deliverables – Visual Subcontract Qtys for Tender
Trade Package Quantities - 3D v 2D
94% 3D
6% 2D
Source: Mitchell Brandtman
3D v 2D by Cost
61% 3D
39% 2D
3D v 2D by No of Items
Final Words
 5D creates better buildings by:
• Enabling early cost decisions
• Targeting money in a transparent way
 5D QS creates cost certainty by applying:
• Wisdom – know how
• Intelligence – templates, maps & data
• Technology – weekly revisioning
Download presentations and articles from:
www.mitbrand.com/info/publications
Thank You

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David Mitchell

  • 1. 5D BIM: Today’s Workflow for Cost Certainty 3rd Annual BIM Summit Sydney 26th August 2013
  • 2. Discussion  How Uncertain are Construction Costs?  What Level of Certainty can be Achieved?  How do I Create Savings?  What Skills does a 5D QS need?  5D BIM Execution Plan  Deliverables SCUH
  • 3. How Uncertain are Construction Costs?
  • 4. How Uncertain is the Market? Research by Evans & Peck, University of Melbourne (2009) • Victorian alliance projects • Average cost increases: • Business Case v TOC +35 - 45% • TOC v Final Cost +5 – 10% Research by Flyvbjerg et al (2003) • 258 projects in 20 nations • 90% of projects had cost overruns • Average cost increase +28% Source: “In Pursuit of Additional Value” - Evans & Peck + The University of Melbourne,Oct 2009 : http://maxwellsci.com/print/rjaset/v5-2621-2629.pdf
  • 5. Source: Mitchell Brandtman MB Brisbane - Financier Watching Brief 1,100 Private Sector Financed Projects: • Procurement Type: • 64% Lump Sum • 17% Owner Builder • Project Type: • 54% Residential • 16% Industrial • Cost Overruns: • Range -13% to +321% • 1 in 4 Projects > +5% -25.0 0.0 25.0 50.0 75.0 100.0
  • 6. What Level of Cost Certainty can be Achieved?
  • 7. Structural Steel Shop DrawingsStructural Steel Fabrication & Erection
  • 8. Final Costs & Time – Structural Steel v Entire Contract % Change Entire Contract: Extensions of Time (38 No) + 57% Variations (321 Claims) + 27% Structural Steel Component (15%): Extensions of Time (zero) + 0% Variations (5 Claims) + 2% Source: Mitchell Brandtman
  • 9. How do I Create Savings?
  • 10. Head Contractors v Sub Contractors 83.0% Subcontract 14.0% Head Contractor - Preliminaries 1.2% Head Contractor - Overheads 1.8% Head Contractor - Profit 15% Profit 68% Labour & Materials Source: Mitchell Brandtman
  • 11. Who Owns the Savings? Source: Mitchell Brandtman Designer Owner D&C Contractor D-B-B Contractor D&C Subcontor D-B-B Subcontor LOD 100 CONCEPT DESIGN Functional efficiency Mass and form optimisation LOD 200 SCHEMATIC DESIGN Design workflow efficiency Alternative methods & systems LOD 300 DEVELOPED DESIGN Design workflow efficiency Alternative materials & products Accurate contract documents LOD 300 "FOR CONSTRUCTION" Accurate "for construction" documents VDC - Construction scheduling, operations & LOD 400 CONSTRUCTION Administrative workflow efficiency Site efficiency Risk reduction LOD 500 OPERATION Administrative workflow efficiency Materials & equipment optimisation PHASE & SAVING TYPE SAVING OWNERSHIP headcontractlet subcontractlet White No ownership Red Low ownership Orange Medium ownership Yellow High ownership Green Complete ownership
  • 12. Design & Bid Pre-Construction (1 month) Construction Arch LOD 300 Struc LOD 300 QS Model Map MEP LOD 200 4D Info 5D Info MEP LOD 300 Steel LOD 400 Prefab LOD 400 4D Time 5D Costs Designers - Coordination & Clash Builder - Coordination, Clash, Activities & Rates StartConstruction For Tender Federated Model For Construction Federated Model Plan to Build & Nominated SC SelectPreferredBid
  • 13. Lean Construction & BIM • Waiting – for materials or specifications • Over Production – producing more than is required • Rework – any work that has to be rectified • Inventory – too much or too little inventory • Transportation – double handling and moving equipment or materials Source: "Recommended Practices for the Application of LEAN ConstructionMethods to Building New Australian LNG Capacity"by Engineers Australia (Western Australia Division)
  • 14. What Skills does a 5D QS need?
  • 16. Improve Information – No need for QSID or Codes Add Parameters
  • 17. Mapping – BQ Level of Detail
  • 18. Pushing Information & Round Tripping
  • 19. Negotiations & Price Transparency • Revised • New • Deleted
  • 24. Deliverables - Revisioning • Revised • New • Deleted
  • 25. Deliverables – Visual Subcontract Qtys for Tender
  • 26. Trade Package Quantities - 3D v 2D 94% 3D 6% 2D Source: Mitchell Brandtman 3D v 2D by Cost 61% 3D 39% 2D 3D v 2D by No of Items
  • 27. Final Words  5D creates better buildings by: • Enabling early cost decisions • Targeting money in a transparent way  5D QS creates cost certainty by applying: • Wisdom – know how • Intelligence – templates, maps & data • Technology – weekly revisioning
  • 28. Download presentations and articles from: www.mitbrand.com/info/publications Thank You