Once the best solution option has been identified, the next stage is determining the parameters of the service that the project has to provide. In other words, its location, size, structure and capacity have to be determined. This requires a realistic assessment of the service demand in the future. For many projects, for example, transport sector projects, demand forecasting is often difficult and tricky but the success of the project greatly depends on it. Once the demand for the service is established, other technical parameters concerning size, capacity, etc can be determined through technical analyses,