Types of projects that would benefit most from the use of electronic simulation include: projects that use 3D modeling, large projects, fast track design-build, heavily process-oriented projects, process piping, rehabilitation projects, greenfield projects, power plants, high-risk projects, grass root and revamp projects, projects with several constraints (e.g., time, supplies, windows, completed logic, unlimited resources), and confined spaces. (RS154-1, p. 21)