9 december 2011 Government Buildings Agency mandates BIM 14 juni 2012

2 Subjects: Building Information Modelling: present situation Importance of BIM for the Government Buildings Agency Connection with functional specification First results: 3 models for Maincontracting Challenges for the supply chain Questions?

3 Building Information Modelling

4 Our view of working with BIM: Central 3D model or combination of models All data needed in the proces of design, construction and maintenance integrated in the model Used by all parties in the proces

5 BIM applications and file formats Wide variety of BIM applications for modelling and analysis of different aspects No strong international standards yet Exchange between BIM applications not always reliable

6 Penetration in the Dutch building sector? In the past few years the use of BIM applications by construction companies, design offices and other parties has seriously increased However, no mainstream yet: mostly ‘in company’ use, incidental exchange between parties

7 BIM in the Government Buildings Agency

8 Motivation for Rgd BIM standard: BIM fits Rgd’s decision to fully concentrate on its role as public real estate procurer: Rgd needs building information to be in control on individual buildings as well as the entire building stock (7,000,000 m2) Diminishing inefficiency – especially in maintenance and operation

9 Embedding in various types of contracts: Best chances in long-term contracts for maintenance (M): DBFMO: 8 contracts to be tendered from 2011 on Maincontracting maintenance: 3 pilot contracts in 2012 DBM: under development

10 Which requirements in BIM standard? All physical an spatial elements represented in the model – in principle in 3D Functional specifications attached to this representation All required building documentation and information extracted from the model

11 Applications and file formats Contractor may choose any BIM application or file format Extracted files in DWG (conventional plans, sections) and IFC (3D model) Native format BIM files must also be provided for development purposes

12 BIM – Functional specification

13 Functions and requirements DBFMO, DBM, Maincontracting: contracts based on functional specification Expressed in terms of functions and requirements Functions and requirements stored in database (Relatics)

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16 BIM as a regular information service: Alterions to building reflected in the model Extracted documents up-to-date and available at all times Extracted documents subject to monitoring and payment mechanism

17 Rgd BIM standard is version 1.0 ! First priority: getting BIM exchange to actually work Experience leads to improved versions of standard Further development of standard communicated with organisations representing the construction sector Rgd monitors the actual use BIM in the supply chain + ICT developments

18 First results

19 Three models for maincontracting: Revit models commisioned by Rgd Based on as-built drawings + on site verification and additional measurement Limited to construction and spatial elements + functional specifications (no MEP) Handover to maincontractor planned July 2012

20 10 juni 2015

21 10 juni 2015

22 10 juni 2015

23 10 juni 2015

24 Challenges

25 BIM applications and file formats Problem: future development of applications uncertain – in particular with respect to exchange between apllications Challenge: practical choices among present applications and formats for maximum result – keep a close eye on further developments in BIM software

26 Information exchange between parties Problem: present culture of information exchange still largely based on one-time hand over of paper documents Challenge: start experimenting with information requirements in long term contracts, aiming at permanent management and exchange of digital information

27 Existing buildings in use Problem: existing information (esp. drawings) often incomplete / inconsistent / unreliable; disturbance of user proces not allowed Challenge: efficient interpretation of existing drawings and other documents Challenge: efficient application of techniques for measuring and verification on site

28 Questions?