The article is devoted to the use of Bayesian networks to analyze the effectiveness of an investment project in the national economy. The paper shows that Bayesian networks (BN) allow us to identify the probabilistic dependencies of the structure of economic indicators of the enterprise, which can be analyzed in more detail using observations and sensitivity analysis of BN. This study shows how the multidimensional nature of the relationship between economic, financial and investment indicators can be used as a decision support tool for investors in formulating strategic recommendations to improve the efficiency of investment investments.