This document is intended to present a complete system-level definition of the SCS
Switchover activities, specifically for the switchover of SCS FM2 to FM1. The document shall
contain sufficient detail so that it can be used as the principle reference to manage the
switchover and all associated activities. All criteria that are pertinent to the execution of the
defined procedures shall be explicit in the sequence of events. The document shall also
address Contingency scenarios and recovery operations so that, as a minimum, the first level
of contingency action is defined and can be applied quickly should the need arise.
