scope:

Where defects with signalling equipment are identified, rectification prioritisation shall be in accordance with this specification. Ordinary fault rectification is not part of defect management. A 'failure' shall normally be repaired by the attending faulting team, the repair being permanent if possible. However, should a temporary repair be undertaken, which needs more work to make the repair permanent (for example, a temporary re-allocation of a relay contact) or a defect identified which shall need to be rectified at a later time (e.g. AWS Strength and Polarity Test giving 'Yellow' requiring rectification but not immediately,) such work shall be prioritised in accordance with this specification. Urgent safety related repairs are not included, as these require rectification immediately.

Purpose

This system specification provides uniform guidance for prioritising signal engineering defects (i.e. work arising from signalling maintenance activities or asset inspections where the task cannot be undertaken at the time it was identified.)