5.2 Configuration Identification an

5.2 Configuration Identification and Baseline ManagementEach project delivering a customized product (e.g. complete trains, locomotives, or propulsion and signaling systems, etc.) deals with very challenging requirements and with very long product life cycles. This requires effective Configuration Management in product development as well as in project execution with a long-term perspective often far exceeding the project life cycle. To ensure maximum sustainability of the products, relevant product configuration information must be available to Product Introduction and later to Operation and Maintenance in subsequent follow-up orders.Configuration Identification [11] addresses the composition of configuration information in the project and how this information is structured and managed in CM baselines in order to deliver consistently the projects obligations.5.2.1 Configuration Items (CIs) and Traceable Items (TIs)Configuration Items are all items (documents or part) describing the product and any other item that the project decides to put under configuration management control (Figure 4).Examples of documents are source requirements, functional specifications, drawings, safety analysis, but also work instruction, maintenance manual or project plans, project schedule, project budget…Examples of products and parts are a locomotive, a bogie, a converter, a train, an electrical cabinet but also a test bench (train lab), a tooling, a jig….Given the size of projects that BT is managing, the list of Configuration Items (CI) is a very large number (typically several thousands). In order to structure and ease the understanding of the configuration management process, but also to create clear accountability, these Configuration Items are organized in CM Baselines as described in section 5.2.2.The Configuration Management Plan shall reflect the scope of Configuration Items selected on the Project and their organization in Baselines as described in