Application of S1 and S4 Service Product Groups - RISAS

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Application of S1 and S4 Service Product Groups - RISAS

    Briefing Note:

    BN 005

Railway Industry Supplier Approval Scheme - BRIEFING NOTE

Subject: Application of S1 and S4 Service Product Groups

    Advice to: RISAB’s and Organisations requesting assessments

    Reference: Standard: RISAS/003/001 Issue 1

Applies when: Carrying out assessments of Service Product Groups S1 and/or


    Note’s To provide clarification on which elements of Service Product

    Purpose: Groups S1 and S4 are applicable to organisations procuring or

    carrying out attention to vehicles or systems and to describe the

    elements expected to be contained in any certificate.

    Background: RISAS Service Product Groups S1 and S4 have been re-issued

    to facilitate the assessment and certification of procurement and

    delivery of maintenance. S1 covers procurement of

    maintenance, repair, modification, overhaul and refurbishment of

    trains or systems of trains, whilst S4 covers delivery of

    maintenance, repair, modification, overhaul and refurbishment of

    trains or systems of trains.

    Within each Service Product Group, the activities are broken

    down into the same five main categories and subsidiary


    This briefing note clarifies how these categories are applied to


    Requirements: When establishing the scope for assessment, the RISAB and the

    organisation to be assessed shall identify which Service Product

    Groups are applicable in accordance with the following definitions

    and examples. The requirements of S1 shall apply if the

    organisation has responsibility for approval and authorisation of

    the specification, whether or not delivery in accordance with the

    specification is procured from an in house supplier or a third


    Definitions: In the table identifying how S1 and S4 elements are applied, the

    following definitions are used.

    Whole life: The life of a vehicle from introduction into service

    until scrapping.

    Service life: During its whole life, a vehicle, or different parts on

    it, will have a number of service lives, after which that part, eg

    running gear or bodywork, will be overhauled and returned to a

    condition ready for a further service life. Different parts of a

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    vehicle may have different service life criteria, with different


    Overhaul: Attention given to that part of a vehicle at the end of

    its service life that makes it fit for a further service life. This may

    be referred to as heavy maintenance in some vehicle leases.

    Some parts have mileage based periodicities, others time based.

    Maintenance: Attention given to vehicles to ensure that they

    continue to work effectively during a service life, including, for

    example, examination, testing and renewal of consumable parts.

    Within this, depots may carry out servicing, eg fuelling and

    cleaning, simple maintenance, eg up to A exams, or full

    maintenance and repair, which includes all attention between


    Repair: Attention given to a vehicle to rectify a defect, but which

    does not affect either its service life or its maintenance.

    Modification: Changes made to a vehicle system, which will

    alter the design of the vehicle.

    Refurbishment: Attention given to vehicles to enhance the

    passenger environment and make the vehicles more attractive to


    System: A vehicle may be broken down into a number of

    systems, eg brakes or running gear. Codes A Z are used to

    describe individual systems, using the T&RS codes.


    The following table identifies how S1 and S4 are broken down.

    ‘A’ relates solely to complete vehicles. ‘B’ and ‘E’ relate only to

    vehicle systems and will be used where companies have

    particular expertise in a limited number of systems, eg vehicle

    interiors. ‘C’ relates to mileage based overhauls, eg for

    passenger vehicles a C4 overhaul. ‘D’ relates to time based

    overhaul, eg for passenger vehicles a C6 overhaul, or, for freight

    vehicles, a GR.

    Code Description Subsidiary elements

    A Full Simple maintenance

    maintenance Servicing

    and repair of a


    B Full A Z system codes plus

    maintenance Full maintenance and repair

    repair and Overhaul only

    overhaul of a

    vehicle system

    C Mileage based

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    D Time based


    E Turnkey A Z system codes plus

    modification to 1. Design of modification

    a vehicle 2. Supply of materials

    system 3. Supply of labour

Pilot Studies

    Pilot RISAS assessments have been successfully concluded for

    both S1 and S4, covering a procurer, a maintenance depot and

    an organisation carrying out modifications.


    The examples given below describe which Service Product

    Group is applicable to a number of situations.

    Situation Services Product


A rolling stock owner wishes to be assessed for S1 D

    procurement of C6 overhauls

    A company with experience of carrying out turnkey projects S4 E I

    on interiors wishes to be assessed

    A TOC depot carries out C4 overhauls for its rolling stock S4 C


    A supplier carries out full maintenance and repair to diesel S4 B D 0372

    engines at TOC premises

    A TOC has full responsibility for its fleet of vehicles (dry S1 A, C, D


    A depot wishes to be certificated for full maintenance and S4 A

    repair of its allocated fleet of vehicles

    A depot wishes to be certificated for its tyre turning S4 B U


    Note: If an organisation also carries out in-house overhaul of a

    piece of equipment, an assessment of that work would involve

    the relevant M product group.

    An overview of the RISAS Services Product Group structure, in

    the context of rail vehicle maintenance and overhaul is contained

    in the diagram at Appendix A.

Scope of Certification - Depots

    When depots are assessed against the relevant S4 code, it is

    unlikely that the description will be sufficient to identify the

    specific areas covered by the assessment. The certificate issued

    will therefore provide further detail, as described in the table


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Constraint Description

Depot Description Site plan, as described in Briefing Note BN-001

    Assessment of Depot Facilities

    Vehicle Types Generic type of rolling stock. List would be


    Wagon, On track plant

    Work assessed This would contain the Service Product group

    code and could be further identified by the

    particular specification or description of the work.

    It would also detail any limitation to specific

    vehicle systems.

    There could be other exclusions, which the certificating RISAB

    would need to identify, to further reduce the possibility of the

    scope of certification being misunderstood.

    In the event of any queries on this Briefing Note, please contact: Contact: John Barber at Rail Safety and Standards Board on 020 7904 7668,

    or by e-mail to

     Signature/Name J Barber

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