Controlling is aimed at gathering information from different departments of a company with the purpose of integrating business processes and providing professional support to the management. A controller in the internal support process for decision-making must apply the information technology knowledge. The controller’s role is to use various high-velocity data to structure, analyse, and transmit information whose origin and meaning need to be known to provide basis for judgements for future periods. The implementation of controlling in AKZ d.o.o. will connect processes ranging from contracting planning to the execution of works. It will allow the flow of necessary information from all departments to the management and vice versa. In the organisational chart of the company, controlling should be decentralised and independent, but permeated evenly and comprehensively through the operations of the entire company. By analysing the data through reports, controlling will help the company identify possible weaknesses, as well as discover the economic and financial strengths of the company, all with the aim of better understanding the operations and making decisions more effectively.