The subject of this paper are specific conditions of performance of business functions and performance of business processes in the MGK - PACK d.d. packaging product manufacturing company in Rijeka. In order to explain specific characteristics of the work of business functions and performance of business processes in the analysed enterprise, it is necessary to describe the terms of the organisational structure themselves, the significance of its design, as well as fine intertwining and comprehensiveness of interlinking and relations among all factors within the enterprise. In addition to the organisational structure, special attention is paid to defining of organisation of the business functions within the company, as well as to the organisation itself and specific properties of the business functions within the company’s organisational structure. The first part of the paper addresses the significance of design of the company’s organisational structure in modern market conditions, and components of the company’s organisational structure. The second part of the paper addresses specific characteristics of organisation of the company’s business functions and provides a description of individual business functions. In the final part of the paper, specific properties of organisation of business functions and performance of business processes are discussed using the MGK - PACK d.d. packaging product manufacturing company based in Rijeka as an example.