scope:

Audience

This standard is relevant to those supplying, selecting, assessing and authorising products for use on the operational network, including Designers, maintainers, contractors and manufacturers.

This standard is generally not applicable to assets owned by others (e.g. Network Rail, commercial development partners or tenants) except where these assets are proposed to be located in areas requiring fire compliance assessment, in which case section 3.5 (only) applies.

Note: Section 5.1 indicates which fire compliance standards are applicable to which asset types and location types. Assets situated within locations fitted with fire detection and suppression systems compliant with LU Standards are exempt from fire compliance assessment under standard S1085 (section 3.11 of S1085 refers).

Applicability

The requirements set out in this Standard apply to physical products, including components, assemblies, embedded software and firmware. These are referred to collectively as 'products' throughout this document.

The requirements set out in this Standard apply in the event of any Product Change. Product Change is defined as any of the following:

a) The introduction of new Products

b) Changes to the design, use or maintenance of Products

c) Changes to embedded software or firmware

d) Changes to the materials or manufacturing process used in the supply of Products

e) Changes of manufacturer or location of manufacture

f) Trials or testing of new Products on the railway infrastructure

A product which forms part of an existing system is deemed to have been assessed for suitability as part of the original design acceptance, and therefore there is no general requirement for products used in 'like for like' maintenance replacement to be reassessed. However, if the product or the associated legislation and standards have changed then the original assessment may no longer be applicable (e.g. where a product contains materials now deemed to be unacceptable).

Products forming part of an existing system whose assessments have the status of 'Expired' (clause 3.6.2) may continue to be used for maintenance 'like for like' replacements. Products which have the status of 'Withdrawn' may no longer be used (see clause 3.2.4).

Note: Any application software and data which forms an intrinsic part of the product and is only accessible to the product manufacturer is within the scope of this Standard.

Purpose

The purpose of this standard is to define requirements such that:

a) all products used in the operation of the London Underground network have been appropriately assessed for their proposed application, including temporary applications and/or trials;

b) information concerning the selection, assessment and authorisation of products is maintained in such a way as to be retrievable in future;

c) LU's product acceptance process is comparable with the system used by the UK national railway

d) requirements for the selection, assessment and authorisation of products clearly support and integrate with the over-arching standard S1538 Assurance.