Study of long-term investment decisions. The purpose of this study is to carry out a thorough examination of the investment in order to make the result of the study like actual reality. The most common criteria on which this investment analysis is based are the evaluation of the feasibility and profitability of the project. To fully understand this term, we must understand what is known as an investment, which is a project for which a financial outlay is required and which, if carried out, would allow a profit to be made in the future.