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Construction Coordination
BIM Curriculum 06
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Topics
Problems of the Construction Industry Objectives The Virtual Construction Model Benefits
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Problem Definition Design
Sub Contractor Cost
Construction
Facility Management
• No direct cost feedback on design decisions• Coordination of trades
• Missing / Incorrect Design Information• Inability to reuse data for shop drawings• Field rework required for prefabricated components• Padding to compensate for risks• Poor subcontractor work flow – “Starts and Stops”• Inadequate quantity information for planning
• Lack of owner trust – difficulties in communicating cost and schedule issues• Production control is based on subjective information • Frequent starts and stops• Estimating is time-consuming and occasionally inaccurate
• Insufficient as-built project documentation • Renovation, addition and demolition planning is time-consuming
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Money Manpower
MaterialsMachinery
Objectives
Winning the bid Fast design feedback
loop Fast & accurate
estimates Value engineering Constructability analysis
Managing the 4 Ms Money Manpower Machinery Materials
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Model Estimating ProcurementSequencing Site Management
Constructability
Analysis Drives Estimating Provides Locations Zone Planning Design to Build /Build to Design
Schedule Analysis Line of Balance Integrated Monte Carlo 4D Simulation Drives Procurement
Data Mining for Supplier Negotiations Tracking of High Risk, Long Lead Items Integrated with the Project Schedule Drives Site Management Process
Short Lead Procurement Site Planning for Materials & Equipment Locations
Fast & Accurate Easy Updates - Linked Drives Sequencing
Construction Planning
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Level of
Deta
il
Time
Review SD QT Price
Schematic Design Phase
Review DD QT Price
Detailed Design Phase
Review CD QT Price
Construction Documents Phase
rework
rework
Traditional Design Process
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Level of
Deta
il
Time
Schematic Design Phase
SD
QT Price
Detailed Design Phase
DD
QT Price
Construction Documents Phase
CD
QT Price
support for iterative design process
New Design Process
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Time (4D) Cost (5D)
Linked Schedules
Linked Estimating
Recipes
The Virtual Construction Model (5D)
BIM Model (3D)
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Project Control
Fabrication 2D Drawings
Constructability Analysis and Coordination
Procurement Schedule
Accounting
Cost Estimate 5D Model
5D Work Flow
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Level of
Deta
il &
Com
ple
xit
y
Design Intent Model
Construction Model
Construction Modeling
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Construction Modeling
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Completed Column
Recipe
Recipes
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Concrete
Reinforcing Bars
Formwork
Cladding / Surface finish
RecipeMethods
Stages Required to Finish Column
Methods
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RecipeMethods
Resources
Resources
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Recipe Methods Resources
Zones/Floors +
=
/ /
The 5D Model
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Benefits: Clash Detection
Conventional methods of coordination are extremely time consuming and error-prone.
Using internal or external clash detection software helps to identify the construction errors in the BIM model
Construction risks and costs can be reduced significantly
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Benefits: Cost Variances
Early Design phases: Which materials? Price of materials?
Solution: Calculate cost ranges
instead of fixed prices
Office
18 sq. m.
Office
22 sq. m.
CorridorOffice
22 sq. m.
Office
20 sq. m.
CorridorOffice
11 sq. m.
Exterior Wall type?
Cost of a double swing door?
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Variance Estimating©
Expected price range:$20 – $25
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Benefits: Design to Build
Design follows construction methodology Acceptable Tolerance Coordination of Trades Quality Check
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Benefits: Build to Design
Measure points Check Onsite Guarantee Fit
X, Y, Z
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Virtual Construction™ Products
Construction Modelers / Project
Engineers
Estimators
Schedulers / PM’s / Supers