The ownership of the obsolescence management process will finally be defined in the divisional specific implementation of the process. The OM directive is applicable to product management, sales, project management, procurement and engineering departments for all projects. This document is the top level directive on OM of vehicle and system projects within BT. The basic requirements identified in this document need to be implemented in the relevant processes of all BT divisions and sites. This document should be read in conjunction with IEC62402