We are witness to great changes that information technology has brought in the past years. It has an equally strong impact on private and professional lives of individuals, the surroundings in which they live and work, as well as companies, their organization and operation. Today, information technology represents an integral part of business operation, which can greatly improve the business and increase the value of the company and IT management became equally important to a company as finance, sales or marketing management. Time will show whether the perception of informatics changed in national companies and to what extent our managers adopted informatics as a source of innovation and competitive advantage. Unstoppable globalization process, long-awaited acceptance of the Republic of Croatia into the European Union and ruthless European and global competition, as well as a long-lasting economic crisis place great challenges before Croatian companies, as well as bringing exceptional opportunities, which only highlights the importance of transforming IT of national companies from the usual position of the generator of unnecessary expense into a strategically managed service provider and new value generator. The research subject of this paper is the importance of IT as a key resource of a company and its application in modern business operation, the transformation of IT, as well as elements and steps in the development of informatics strategy. The paper deals with IT Governance and the development of IT strategy and through an overview of the best global practices it tries to address the basic elements and foundations for development and successful implementation of informatics strategy. The main topic of the paper is a case study of IT development in a heterogeneous business environment through the revision of the information system and its results as a basis for development and implementation of IT strategy.