H Salarpour - Ms student, Faculty of civil engineering, University of Tehran
A. Hosseini - Assistant professor, Faculty of civil engineering, University of Tehran

In consideration to the intense competitive environment, especially in recent years, because of financial problems and unsuitable economic situations, a great many of contractors have to abandon their works or lose a good number of projects counted so profitable. The main reason about appearing this problem in organization is facing with negative liquidity conditions and remaining in this situation for a long time. Difference and imbalance between income and expense throughout the projects can lead to the increase of project’s failure probability. For solving this problem, it is important to develop a methodology to forecast and model the project liquidity. This paper represents a model for forecasting income and outcome of projects with the use of historical data from previous similar projects as the base of prediction and applies the fuzzy theory for modeling uncertainty

cash flow, fuzzy approach, forecasting, construction projects, projects liquidity