Constructability is an approach that links the design and construction processes, which can lead to significant savings in both cost and time required for completing construction projects. Improving constructability of construction projects is the responsibility of all project stakeholders: owners, designers and contractors. The owners have the most authority in enforcing implementation of constructability, therefore their role in constructability improvement of construction projects is the most important. Project owners must be aware that the decisions that are made in the initial stages of planning and design are difficult and costly to change once construction begins. This paper describes a study how construction project owners integrate construction knowledge and experience into planning and design in existing practice; and their role in improving constructability. The methodology chosen to find the answers to these questions was to use case studies. Interviews, conducted using structured questions, were used as the main method of data collection in the case studies. The study shows that project owners in Indonesia do have some understanding of the importance of constructability. The method of constructability input is determined by the project owners’ selection of project delivery approaches. Any project stakeholders can provide constructability inputs. However, involving contractor personnel early in the project can identify major problems that may be encountered during the construction phase and leads to the greatest improvements in project performance.
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