The Bromilow Time-Cost model: a case study for the infrastructure projects in Romania

Abstract The Bromilow Time-Cost model is widely applied for estimating the duration of the construction works. The application of this model requires the estimation of different model’s parameters, which are capturing the economic, social and technological differences in projects’ implementation in different regions/countries. The paper aims to develop a mathematical Time-Cost model to be applied in Romania for the road infrastructure projects, grouped into four categories: highways, road rehabilitation, road modernization and by-pass. The research carried out by the authors has as objective to confirm the existence of the correlation between the project duration and costs, and to propose a procedure to be applied by the public decision authorities in order to estimate the duration of road infrastructure contracts. Tthe estimation of the implementation time was done through three scenarios: optimistic, most likely and pessimistic. The parameters of the Bromilow Time-Cost model and the regression models were identified