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자료유형
학술저널
저자정보
Shabani, Neema (Ardhi University, Department of Land Management and Valuation) Mselle, Justine (Ardhi University, Department of Land Management and Valuation) Sanga, Samwel Alananga (Ardhi University, Department of Land Management and Valuation) Kanuti, Arbogasti Isidori (Ardhi University, Department of Land Management and Valuation)
저널정보
한국건설관리학회 Journal of construction engineering and project management Journal of construction engineering and project management 제8권 제2호
발행연도
2018.1
수록면
17 - 33 (17page)

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This study investigates the stability of professionals' cost variability factor-rankings across different levels of cost-variability and response scenarios. Descriptive statistics are used to examine the stability of factor-ranking for 20 cost variability factors and a Multinomial Logistic (MNL) regression model was implemented to examine the stability of cost variability factors across three cost variability levels. The finding on the descriptive statistics indicated that professionals' factors-rankings are stable only for external factors. The MNL regression results on factor-stability suggested that 8 out of the 20 evaluated factors were unstable determinant of lower cost variability levels. These factors are "risk associated with the project", "personal bias and poor professionalism of the estimators", "limited time available to complete the project", "lack of skills and experience by estimator" "geographical location of projects", "incomplete & rush designs for estimate", "unforeseen or unexpected site constraints", "high class bidders for the contractors". Similarly lack of experience and large size projects were observed to be unstable as well. These observations suggest that professionals' view on pre-tender cost variability factor-ranking yields unstable factor rankings hence should not be relied upon as the only mechanisms to mitigate cost related risks in construction projects.

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