Abstract: A computer-based construction project management system, for use in controlling the assembly of structures, including three software sub-systems; a first sub-system that receives data relating to an individual task of a construction project; a second sub-system, for project scheduling, that allows a planner to view and modify the timing and inter-relation of key events and a third sub-system that converts data from the first and/or second sub-systems into a visual three dimensional graphical representation which allocates space in a three dimensional model of the structure to the task, as an event in time.