The digital ICT revolution, with the new applications BIM, DT and AI package tools, reaches the organizational processes after the design and technology processes. That is, the management of business systems with complex processes is essential for ongoing projects to improve economic principles as components of the business system. With the advent of ISO standardization, companies are standardizing business communication flows to improve processes and facilitate the work of managers during idle periods. However, it has been found that the transition from the previous manual static technology to software does not bring about a significant change in business performance. Therefore, the recommendation is to change the model of the organizational structure with mathematical modeling to a dynamic vector organization, which is upgraded to a process system as a by-product of the computerization of the project production economy. By adding the matrix structure of the project organization and the function in addition to the process, a fourth resource dimension is added. This results in an nD vector organization system that enables a “daily monitoring” system, i.e., daily management of the business system. But even this method of ICT technology proves to be insufficient in the old costing or tendering system. Therefore, for mathematical modeling, the dynamic structure programming (DSP) method is proposed, which creates a model standardization of the bill of quantities, bid constructions, and standards as elements of the project. Križaić’s DSP method is a logical induction equation that, in cooperation with vector norms and a modified Gaussian S-curve equation (MGSC), creates a digital twin (DT) for a business system for monitoring project resources. With the upgrade to BIM and DT tools, it is possible to close the loop of the business system and create an AI system for project management, which in turn creates an intelligent manager and an organizational differential (OD).