This document describes the requirements for deliverables, contents and best practices for company's 3D CAD models using the Aveva design and administration application.This document describes the requirement for the data structure in the 3D model. The target group is everyone involved in creating or updating the company 3D CAD models. This includes everyone that is:involved in creating or updating 3D LCI information, contractor engineering personnel, equipment suppliers, company engineering personnel;involved in performing LCI quality control (e.g., engineering, MC, commissioning team, LCI coordinators, LCI supervisors, information owners, document controllers, material administrators);involved in maintaining LCI for plants in operation.Subsea modelling and renewable modelling requirements given in Clause 14 are dependent on the complete 3D CAD modelling specification and cannot be read independently.If users are in any doubt in interpretation of this document, a consult with relevant company can be necessary.