A 3D model of the process system and facility provides a foundation for generating layout, elevation and orthographic views of the process. Isometric piping drawings with bill-of-material can be generated to significantly reduce construction costs and change orders. Three-dimensional models are used for a virtual walk-through to gather valuable design feedback from safety, maintenance, operations and quality personnel. These reviews allow higher levels of design acceptance across the organization, another contribution to reduce construction and change order expenses.

Integrating the 3D process model with a detailed construction schedule allows 4D design –which adds the dimension of time. Planned demolition and construction can be viewed in a time-based virtual walk-through with all project stakeholders. This provides opportunity to find interferences and deal with problems in the design phase rather than during construction.