International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference CLC/TR 50126-3:2008
Title Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 3: Guide to the application of EN 50126-1 for rolling stock RAM
Project Number 21425
Abstract/Scope This document provides guidance on applying the RAM requirements in EN 50126-1 to rolling stock and for dealing with RAM activities during the system life cycle phases from invitation to tender to demonstration in operation only. All references to EN 50126-1 concern the version of 1998. The guide is aimed at the customers/operators and main suppliers of rolling stock. The main purpose of the guide is to: * enable a customer/operator of rolling stock: − to specify the RAM requirements addressing the type of operation in terms of the end customer needs, considering service availability and economic considerations; − to evaluate different tenders, in terms of RAM requirements, on a common basis with the aid of specific RAM documents; − to gain assurance, during design/development phase, that the rolling stock being offered is likely to satisfy the RAM contractual requirements by examining step by step detailed and specific RAM documents as an output of the RAM activities performed during the development phase; − to validate that the rolling stock, as delivered, satisfies the specified RAM requirements * to enable the main supplier of rolling stock − to understand the customers/operators RAM requirements − to provide substantive information/visibility in a tender to show that the product offered is likely to satisfy the RAM requirements by performing preliminary RAM analysis; − to provide substantive information during design/development phase to show that the product offered is likely to satisfy the RAM requirements by performing detailed RAM analysis; − to demonstrate that the product delivered satisfies the RAM requirements; Regarding LCC, this application guide is restricted to providing only the key RAM parameters necessary to be incorporated into an LCC Model. This application guide excludes: * RAM values connected to the different RAM requirements (however, it contains a simple guide line of actions for supporting the decision making process and choosing appropriate values, see 5.4) * specific RAM documents to be produced and activities to be performed. However, it provides, only as an example, typical data and document templates for recording the output of a RAM analysis).


Current Stage code 6060
Current Stage code date 2008-07-30
Current Stage code deadline  
Deadline date for vote 2008-07-31


Order Voucher  


IEC Technical Body  
Reference Document  
ICS 29.280 - Electric traction equipment
45.020 - Railway engineering in general
Keywords Railway applications; Rolling stock
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2008-07-30   export to doc file  EN
5099 2008-05-09 2008-09-09  
5060 2008-04-28 2008-05-09 export to doc file  EN
5020 2008-01-25 2008-04-25 export to doc file  EN
3090 2007-12-07 2008-01-07  
1099 2007-09-11 2008-03-11  
1000 2007-06-26 2007-09-12  

Implementation Dates

date of Ratification (DOR) (1) 2008-05-09
date of Availability (DAV) (2) 2008-07-30
date of Announcement (DOA) (3) -
date of Publication (DOP) (4) -
date of Withdrawal (DOW) (5) -


Supersedes CLC/TR 50126-3:2006
Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.