scope:

This document covers the following areas of non-functional requirements:

• Safety
• Dependability, Reliability and Availability
• Configuration Management
• Electro-magnetic Compatibility
• Environmental Performance

Ergonomic requirements are covered in Appendix D1.

Maintenance requirements are covered in Appendix E.

Purpose

This specification forms a part of the Modular Signalling Handbook. It defines the non-functional requirements that shall apply to both the selection and deployment of Modular Signalling systems on secondary lines. It defines principal requirements that shall apply and provides guidance to projects on how non-functional requirements can be met and demonstrated.