Diana Car-Pušić

Time and cost interdependence in water supply system construction projects

AbstractTime and price of contracted construction as well as their overrun are among highly pronounced issues in the construction practice. Numerous studies indicate that there is a dependency between these parameters at various construction markets. The paper shows the results of a research conducted on a group of 40 projects related to water supply systems carried out in the Federation of Bosnia and Herzegovina from 2001 to 2012. Collected data, obtained through interviewing chief engineers of construction companies, have been used as input parameters for implementation of single linear regression by applying the BTC (Bromilow time-cost) algorithm. The final result is a model in the form of an exponential equation. Whereas it was obtained based on effectuated values, it can be considered appropriate for assessing and testing the construction time in the early planning stage, as well as at work contracting. Since the parameter values in the model depend on circumstances of the specific area under conside...

Establishing a model to evaluate public administration projects

Public investment projects are projects in which the public interest is paramount. The public administration generates public projects, which can be grouped into portfolios. We often witness poor, disordered public investment and project selection. One reason is the lack of adequate, consistent methodology for evaluating and selecting projects. It can be difficult to choose from comparable projects within the portfolio, and the attitudes of the stakeholders can hinder decision-making, highlighting the need for multi- criteria analysis. To select the best project, we designed a model to evaluate and rank public administration projects. We presented a hierarchical structure of objectives and criteria for comparing projects. To select and compare projects according to these defined criteria and assigned weights, we used PROMETHEE II. We simulated and validated this model using the portfolio of the city of Kastav. This model contributes to higher quality and more consistent decision-making in selecting the best investment project from a public administration portfolio.