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Modelling construction completion cost in Ghana public sector building projects

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Abstract

The research suggests that project completion cost is affected by various predictive factors. Using 911 building projects undertaken in Ghana, this paper uses the multiple regression analysis to develop a forecast model that allows estimating completion cost of projects at the contract award stage. The proposed model uses initial contract sum, number of storeys, scope change and initial duration as predictive variables for projects completion cost. Initial contract sum has a more significant influence in completion cost with the other variable also contributing to the value of completion. Sensitivity analysis was carried out to determine the best performing model among the three models developed.

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Authors and Affiliations

  1. Faculty of Engineering and the Built Environment, University of Johannesburg, Johannesburg, South Africa

    George Harrison Coffie, Clinton Ohis Aigbavboa & Wellington Didi Thwala

  2. Department of Building Technology, Faculty of Engineering, Ho Technical University, P. O. Box HP 217, Ho, Ghana

    George Harrison Coffie

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  1. George Harrison Coffie
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  2. Clinton Ohis Aigbavboa
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  3. Wellington Didi Thwala
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Correspondence to George Harrison Coffie.

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Coffie, G.H., Aigbavboa, C.O. & Thwala, W.D. Modelling construction completion cost in Ghana public sector building projects. Asian J Civ Eng 20, 1063–1070 (2019). https://doi.org/10.1007/s42107-019-00165-7

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  • DOI: https://doi.org/10.1007/s42107-019-00165-7

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