scope:

This module covers the content and use of aspect sequence charts required as design deliverables. It applies to anyone engaged in the production of aspect sequence charts, which are to be used for commissioning or maintenance on Network Rail Infrastructure. Aspect sequence charts should be produced as soon after the signalling scheme plan receives AFC status and before control tables are produced. Aspect sequence charts form part of the signalling records.

Purpose

This module details the contents and function of aspect sequence charts to facilitate the production of accurate records for commissioning and maintenance use.