M Taghavifard - Faculty of Accounting & Management, Allameh Tabatabaei University, Tehran, Iran
K Khalili Damghani - Department of Industrial Engineering, Faculty of Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran
M Asadi - Kayson Company, Information Management Department

In this article, a mathematical programming model for choosing an optimum portfolio of investments is developed. The investments are considered as investment projects. The uncertainties of the real world are associated through fuzzy concepts for coefficients of the proposed model (i. e. initial investment costs, profits, resource requirement, and total available). Model has been coded by using LINGO 11.0 solver. The results of a full analysis of optimistic and pessimistic derivative models are promising for selecting an optimum portfolio of projects in presence of uncertainty.

Fuzzy Programming, Fuzzy Knapsack, Fuzzy Capital Budgeting, Fuzzy Project Selection