The document describes a 3D management constructor, which is a complex three-dimensional model for project management. The model is intended to serve the process of decision-making by performing distribution and control functions. It will be designed as an IT system that allows building a three-dimensional management model for projects, processes, or systems. The model represents a database of typical managerial patterns and decisions that can be filtered and structured. It allows constructing any management object by building it from standard cells containing typical management situations and decisions. The 3D nature of the model allows seeing multiple logical intersections and interdependencies between different dimensions, such as management levels, timeline stages, and management processes.