1. There is tremendous variation in the size and type of construction companies.
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Question
1. There is tremendous variation in the size and type of construction companies. In 2004, what percent of fi rms were composed of one to nine people? In what sector were a majority of these fi rms?
2. What are the main advantages of design-build over designbid-build contracts? Why does the use of BIM favor the design-build contract? For public projects, why are designbid-build contracts often preferred (see also Chapter 1, Section 1.1.2)?
3. What are the key innovations in procurement in IPD contracts? How do they change the commercial interests of construction contractors in construction projects? What uses of BIM are enabled by an IPD contract, as opposed to design-bid-build or even design-build contracts?
4. From the contractor’s point of view, what kinds of information should a building model contain? If the architect uses BIM to design a building, what information needed by the contractor is not likely to be present?
5. What approaches are available to develop a building model that can be used by the contractor? What are the limitations and benefi ts of each approach?
6. What level of detail is needed in a building model for useful clash detection? What are the reasons for detecting soft as opposed to hard clashes? What role do subcontractors play in the clash detection process?
7. What are the main advantages and limitations of using BIM for preparing a cost estimate? How can an estimator link the building model to an estimating system? What changes are likely to the model to provide support for accurate quantity takeoff?
8. What are the basic requirements for performing a 4D analysis of a construction schedule? What are the contractor’s options for obtaining the information needed to carry out this analysis? What major benefi ts can be obtained from this analysis?
9. How can BIM be linked to cost and schedule control systems? What advantages does this provide?
10. What are the main advantages of using BIM for procurement? Why is it still diffi cult to do this?
11. What are the requirements for using a building model for offsite fabrication? What types of exchange standards are needed for fabrication of steel members?
12. Consider the Crusell Bridge case study (Chapter 9). In what specifi c ways did use of BIM make the project processes leaner? In what ways did the contractor fail to exploit the model to apply lean construction?
13. What types of organizational and contractual changes are needed for effective BIM use?
Explanation / Answer
1) 13.6 percent, Sector- specialty trade category
10) Detailed building information,Temporary components,Speci cation information associated with each building component,Analysis data related to performance levels and project requirements,Design and construction status
it is difficult to do because No BIM tool or contract today comes close to requiring or satisfying this list of requirements
11) Offsite fabrication requires considerable planning and accurate design information. It is becoming more common for contractors to fabricate components offsite to reduce labor costs and risks associated with onsite installation
Exchange Standard- CIS/2 format ,AISC ,NBIMS
9) BIM can be linked to Schedule Control Systems because it supports following tasks
Track variances between budget and actual cost
Project status
Procurement purchasing
Procurement tracking
Safety management
The main advantage of this is that BIM software can provide vital support for these tasks, because it has detailed quantity and other component information that can be linked to other application.Furthermore, contractors and project stakeholders can gain new insights by leveraging a graphic model to visually analyze project progress and highlight potential or existing problem
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