Poor knowledge and lack of awareness
Client- According to IBS Roadmap Review (2007) report, the adoption of IBS in Malaysia is a client driven e.g. Jaya Jusco, Tesco etc. where client has insist on fast track construction. In housing development, client with a good knowledge and awareness of IBS benefit will therefore encourage appointed designers to design building in IBS. However, lack of awareness program lead to misinterpretation and thefore contributed to a lack of interest from the client and decision makers (Rahman & Omar, 2006). From the client point of view, unless the were necessary fast track project e.g Tesco, Jusco project, IBS is often misinterpreted as high risk and expensive solution.
Designer- Lack of knowledge among the IBS designers contributes to the project delays. Designer need extra time to produce details drawing etc.
Another major thing that you should also consider as barrier is our experience in dealing with established architects. There are the hardest to convince to use IBS compared to smaller and less established architects. For them, function must follow form. But in IBS, it is the other way around - (add by IBS Modular Sdn. Bhd @ http://ibsmodular.blogspot.com/)
Local Authorities - Poor knowledge among the approving authorities has resulting misunderstanding and misinterpreting of IBS and its relation to the current building regulation. Familiarity with IBS will expedite design approval and it is vital to ensure successful IBS project (Construction Industry Master Plan, 2007). The majority of the authorities nonetheless is not aware of IBS design and often takes more time than usual to process design approval.
Policy Makers- It is also observed by Chung & Kadir (2007) recently that most of local authorities in Malaysia are unlikely to change local building regulation to suit IBS as the amendment will consume a lot of time and cost. According to IBS Mid Term Review (2007), the enforcement of Modular Coordination (MC) trough the amendment of Uniform Building by Low (UBBL) is yet to be implemented due to poor knowledge and awareness on this concept among the policy makers.
Workers- Government hoped IBS would help reduce dependence on foreign workers by 30 per cent by 2015. But most industry people don't think IBS will greatly reduce the number of workers in the industry. IBS is taking the problem from a job-site environment to a factory environment," said a senior industry insider. Pre-cast means instead of going to the job site to cast, I'm going to the factory to do the casting and then putting them together at the job site. So how can you do pre-cast without the wet-trade workers. He stressed that there's still a lack of skilled local workers because of the mismatch between the training the CIDB provides and industry needs (NST 30/8/2008)
Improper planning and failed to consider IBS at the design stage
IBS as alternative method - At presents, the pre-casters and contracting firm in Malaysia are involved after tender stage of the construction value chain. IBS design needs to be addressed and plan form the design stage to be successful adopted trough the integration of pre-caster, designer and contracting firm and not trough proposing alternate design (IBS Roadmap Review, 2007). As a result, a lot of IBS project in Malaysia (IBS as alternate design) is not cost effective because the process of changing in design requires a lot of further adjustment will rise the initial time and cost. If IBS is considered at design stage will also solve issues related to manufacturing, transportation and logistic that can be pre-plan ahead of time.
Lack of proper planning on IBS - Moreover, IBS requires more coherent structure of process planning and control from start to end of the project in order to reach the goals and reduce defect and errors (Gibb, 2001) (Warszawski, 1999).
"Books from Prof.Alistair G.F. Gibb; Off-site: prefabrication, pre-assembly and modularisation and Industrialised and Automated Building Systems : A Managerial Approach by Abraham Warszawski. Prof.Gibb currently attached at University of Loughborough is Frenchmen. When my first time i met him at UKTI Offsite / IBS Seminar at Kuala Lumpur in 2005. While Warszawaski from Israel, i had never met him before" (Rfd21 @ http://buildingsystem.blogspot.com/)
The overall project should be planned in such way that as soon as the components are manufactured, it is possible to transport it to the construction site and assemble it. Any delays either on manufacturing floor or construction site has severe impact on staging requirement and production planning where components from several construction projects are scheduled for production at the same time.
Result - There are cases, where building projects are awarded and constructed using IBS system but were carried out with many difficulties. The most common problems encountered are improper assembly of the components that normally involved the beam-to-column and column-to-base connections due to impropoer planning and coordination at design stage (Rahman & Omar, 2006)