The overall purpose of AVEVA E3D™ is the controlled creation of a complete three‑dimensional project design model using computer‑simulation techniques. The Engineering and Diagrams products enable the creation and control of 2D schematic and conventional engineering to support the 3D model. All information which exists about a design project, whether administrative or technical, 3D or 2D is stored in a series of hierarchical databases. Use of the various modules allows the user to create, modify and extract information from these databases.