Stanford Cath Labs 7, 9, & 10 Numeric results of CAD vs. BIM to 2” vs. full BIM Jason Holbrook David Denysenko Eric Peabody
Experimental BIM Use Comparison on Stanford Hospital Cath Labs
Nov 21, 2014
This presentation is a cost comparison between three nearly identical projects where the only variable is the use of BIM. The first cath lab was delivered using a traditional CAD approach, the second cath lab used industry standard BIM (modeling objects down to 2"), and the third cath lab modeled everything including studs and outlet boxes. The change order rates dropped to practically nothing but the costs were a bit surprising.
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Stanford Cath Labs 7, 9, & 10 Numeric results of CAD vs. BIM to 2” vs. full BIM
Jason Holbrook
David Denysenko
Eric Peabody
7
9
10
Experimental Controls
BIM Use Area* Start** ArchitectCath Lab 7
CAD 720 SF 2006
Cath Lab 9
2” Standard
1,173 SF 2009
Cath Lab 10
Everything
1,060 SF 2010
Experimental Variables
*Results expressed per SF to normalize this variable**Cost values escalated to 2010 relative value to normalize this variable
What’s supposedly in it for me?Save up to 23% on project costsComplete project 35% fasterDrop change order rate to <0.1%44% fewer RFIs
The Design Partnership LLP Architects + Planners
What’s supposedly in it for me?23% less $Complete project 35% fasterDrop change order rate to <0.1%44% fewer RFIs
The Design Partnership LLP Architects + Planners
What’s supposedly in it for me?Save up to 23% on project costs
35% fasterDrop change order rate to <0.1%44% fewer RFIs
The Design Partnership LLP Architects + Planners
What’s supposedly in it for me?Save up to 23% on project costsComplete project 35% faster
Changes to <0.1%
44% fewer RFIs
The Design Partnership LLP Architects + Planners
What’s supposedly in it for me?Save up to 23% on project costsComplete project 35% fasterDrop change order rate to <0.1%
44% fewer RFIs
The Design Partnership LLP Architects + Planners
Cath Lab 7CAD Only
The Design Partnership LLP Architects + Planners
7
Cath Lab 7: Siemens Biplane Cath LabProject Area: 720 Gross Square Feet Construction Start: 2006
Procedure Room: 600 Net Square Feet BIM Use: None
The Design Partnership LLP Architects + Planners
(E) CAD V.I.F. (N) CAD Construction
The Design Partnership LLP Architects + Planners
(E) CAD V.I.F. (N) CAD Construction
The Design Partnership LLP Architects + Planners
(E) CAD V.I.F. (N) CAD Construction
The Design Partnership LLP Architects + Planners
(E) CAD V.I.F. (N) CAD Construction
The delay was caused…by the over-head structural and M/E/P/FP not being coordinated. The majority of the overhead had to be re-designed.
The Design Partnership LLP Architects + Planners
“ ”DPR Construction
Cath Lab 9BIM to 2”
The Design Partnership LLP Architects + Planners
9
Cath Lab 9: Siemens Biplane Hybrid ORProject Area: 1,173 Gross Square Feet Construction Start: 2009
Procedure Room: 821 Net Square Feet BIM Use: Model to 2”
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
Cath Lab 10BIM Everything
The Design Partnership LLP Architects + Planners
10
Cath Lab 10: Siemens Biplane Pediatric Cath LabProject Area: 1060 Gross Square Feet Construction Start: 2010
Procedure Room: 717 Net Square Feet BIM Use: Model Everything
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
The Design Partnership LLP Architects + Planners
3D Scan (E) Model (N) Model
Construction
Results
The Design Partnership LLP Architects + Planners
BIM Use % from CAD
Cath Lab 7
CAD
Cath Lab 9
2” Standard
-15.0%
Cath Lab 10
Everything
-4.1%
Construction Cost
Change Order Cost
*All figures in 2010 Relative Value
BIM Use % of TotalCath Lab 7
CAD 12.4%
Cath Lab 9
2” Standard
8.1%
Cath Lab 10
Everything
<0.1%The Design Partnership LLP Architects + Planners
*All figures in 2010 Relative Value
BIM Use Construction Days/SF % from CAD
Cath Lab 7
CAD 8.40 mo 0.23 D/SF
Cath Lab 9
2” Standard
8.50 mo 0.15 D/SF -34.8%
Cath Lab 10
Everything
8.45 mo 0.16 D/SF -30.4%
Construction Schedule
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All Costs
*All design professional fees, including non-BIM fees**Cath lab contribution margin of ~$8,000 per day
Survey All Services*
Construction $
Margin** Total
Cath Lab 7 18.5% 18.5%Cath Lab 9 1.6% 27.3% (15.0%) (22.0%) (23.3%)Cath Lab 10
1.6% 18.5% (4.1%) (18.6%) (17.9%)
ConclusionsSave up to 23% on project costsComplete project 35% fasterDrop change order rate to <0.1%44% fewer RFIs
The Design Partnership LLP Architects + Planners
Thanks. Questions?
Jason [email protected] 721-1928
David [email protected] 736-7546
Eric [email protected] 777-3737
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