Abstract. One of important assumptions in decision making process and improvement economy is existence of quality information. Significant number of this information comes from accounting information systems and from financial statements. Financial statements have to provide realistic and objective picture of realistic business condition of certain company. In other words, auditing of financial statements is understandable, by which accuracy is ensured. In context of consideration of financial statements as a function of decision making it is important to emphasize that different users must know how to “read” those statements. “Reading” contents of financial statements provide whole number of different instruments and analyses procedures for understanding business. A well-established process of management on the basis of the financial statements and financial information is one of the most significant presumptions of the quality business.