Abstract
The issue of improving the efficiency of business operations is of particular importance in the conditions of modern business environment. For managers, the big challenge is how to achieve and to maintain, not to mention how to improve efficiency in a highly heterogeneous, complex, uncertain and unpredictable business environment. Significant sources of enterprise efficiency in a modern business environment are enterprise restructuring, business activities, as well an integrated approach to cost management, which is becoming an increasingly important determinant of business success and a source of competitive advantage. The paper provides an overview of theoretical and empirical research of the effects of certain sources on the performance of the enterprise. The conclusion is that only the complementary exploitation of all sources contributes to improving the efficiency of the enterprise in the long run.