{"id":248214,"date":"2024-10-19T16:21:00","date_gmt":"2024-10-19T16:21:00","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-50126-22017\/"},"modified":"2024-10-25T11:29:51","modified_gmt":"2024-10-25T11:29:51","slug":"bs-en-50126-22017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-50126-22017\/","title":{"rendered":"BS EN 50126-2:2017"},"content":{"rendered":"<p>This part&nbsp;2 of <span class=\"std\"> <span class=\"std-ref\">EN&nbsp;50126<\/span> <\/span><\/p>\n<ul>\n<li>\n<p>considers the safety-related generic aspects of the RAMS life-cycle;<\/p>\n<\/li>\n<li>\n<p>defines methods and tools which are independent of the actual technology of the systems and subsystems;<\/p>\n<\/li>\n<li>\n<p>provides:<\/p>\n<ul>\n<li>\n<p>the user of the standard with the understanding of the system approach to safety which is a key concept of <span class=\"std\"> <span class=\"std-ref\">EN&nbsp;50126<\/span> <\/span>;<\/p>\n<\/li>\n<li>\n<p>methods to derive the safety requirements and their safety integrity requirements for the system and to apportion them to the subsystems;<\/p>\n<\/li>\n<li>\n<p>methods to derive the safety integrity levels (SIL) for the safety-related electronic functions.<\/p>\n<\/li>\n<\/ul>\n<div class=\"non-normative-note\">\n<div class=\"note-label\">\n    NOTE\n   <\/div>\n<p>This standard does not allow the allocation of safety integrity levels to non-electronic functions.<\/p>\n<\/p><\/div>\n<\/li>\n<li>\n<p>provides guidance and methods for the following areas:<\/p>\n<ul>\n<li>\n<p>safety process;<\/p>\n<\/li>\n<li>\n<p>safety demonstration and acceptance;<\/p>\n<\/li>\n<li>\n<p>organisation and independence of roles;<\/p>\n<\/li>\n<li>\n<p>risk assessment;<\/p>\n<\/li>\n<li>\n<p>specification of safety requirements;<\/p>\n<\/li>\n<li>\n<p>apportionment of functional safety requirements;<\/p>\n<\/li>\n<li>\n<p>design and implementation.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>provides the user of this standard with the methods to assure safety with respect to the system under consideration and its interactions;<\/p>\n<\/li>\n<li>\n<p>provides guidance about the definition of the system under consideration, including identification of the interfaces and the interactions of this system with its subsystems or other systems, in order to conduct the risk analysis;<\/p>\n<\/li>\n<li>\n<p>does not define:<\/p>\n<ul>\n<li>\n<p>RAMS targets, quantities, requirements or solutions for specific railway applications;<\/p>\n<\/li>\n<li>\n<p>rules or processes pertaining to the certification of railway products against the requirements of this standard;<\/p>\n<\/li>\n<li>\n<p>an approval process by the safety authority.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>This part&nbsp;2 of <span class=\"std\"> <span class=\"std-ref\">EN&nbsp;50126<\/span> <\/span> is applicable to railway applications fields, namely Command, Control and Signalling, Rolling Stock and Fixed Installations, and specifically:<\/p>\n<ul>\n<li>\n<p>to the specification and demonstration of safety for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined sub-systems and components within these major systems, including those containing software, in particular:<\/p>\n<ul>\n<li>\n<p>to new systems;<\/p>\n<\/li>\n<li>\n<p>to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system;<\/p>\n<\/li>\n<li>\n<p>as far as reasonably practicable, to modifications and extensions of existing systems accepted prior to the creation of this standard, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system;<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>at all relevant phases of the life-cycle of an application;<\/p>\n<\/li>\n<li>\n<p>for use by railway duty holders and the railway suppliers.<\/p>\n<\/li>\n<\/ul>\n<p>It is not required to apply this standard to existing systems which remain unmodified, including those systems already compliant with any former version of <span class=\"std\"> <span class=\"std-ref\">EN&nbsp;50126<\/span> <\/span>.<\/p>\n<p>The process defined by this European Standard assumes that railway duty holders and railway suppliers have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality management requirements contained within <span class=\"std\"> <span class=\"std-ref\">EN&nbsp;ISO&nbsp;9001<\/span> <\/span>.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>undefined  <\/td>\n<\/tr>\n<tr>\n<td><b>48<b><\/td>\n<td>Annex A (informative)ALARP, GAME, MEM <br \/> A.1 ALARP, GAME, MEM as methods to define risk acceptance criteria  <\/td>\n<\/tr>\n<tr>\n<td><b>49<b><\/td>\n<td>A.2 ALARP (As Low As Reasonably Practicable) <br \/> A.2.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>50<b><\/td>\n<td>A.2.2 Tolerability and ALARP <br \/> A.3 Globalement Au Moins Equivalent (GAME) principle <br \/> A.3.1 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>51<b><\/td>\n<td>A.3.2 Using GAME <br \/> A.3.2.1 General <br \/> A.3.2.2 Basic principles <br \/> A.3.2.3 Using GAME to construct a qualitative safety argument <br \/> A.3.2.4 GAME using quantitative risk targets  <\/td>\n<\/tr>\n<tr>\n<td><b>52<b><\/td>\n<td>A.4 Minimum Endogenous Mortality MEM  <\/td>\n<\/tr>\n<tr>\n<td><b>54<b><\/td>\n<td>Annex B (informative)Using failure and accident statistics to derive a THR  <\/td>\n<\/tr>\n<tr>\n<td><b>55<b><\/td>\n<td>Annex C (informative)Guidance on SIL Allocation  <\/td>\n<\/tr>\n<tr>\n<td><b>57<b><\/td>\n<td>Annex D (informative)Safety target apportionment methods <br \/> D.1 Analysis of the system and methods <br \/> D.2 Example of qualitative apportionment method <br \/> D.2.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>58<b><\/td>\n<td>D.2.2 Example of qualitative method for barrier efficiency  <\/td>\n<\/tr>\n<tr>\n<td><b>60<b><\/td>\n<td>D.3 Example of quantitative apportionment method <br \/> D.3.1 Introduction  <\/td>\n<\/tr>\n<tr>\n<td><b>61<b><\/td>\n<td>D.3.2 Functions with independent failure detection and negation mechanisms  <\/td>\n<\/tr>\n<tr>\n<td><b>63<b><\/td>\n<td>D.3.3 Function and independent barrier acting as failure detection and negation mechanism  <\/td>\n<\/tr>\n<tr>\n<td><b>64<b><\/td>\n<td>D.3.4 Apportionment of a probability safety target <br \/> D.3.5 Apportionment of a \u201cper hour\u201d safety target  <\/td>\n<\/tr>\n<tr>\n<td><b>66<b><\/td>\n<td>Annex E (informative)Common mistakes in quantification <br \/> E.1 Common misuses <br \/> E.2 Mixing failure rates with probabilities  <\/td>\n<\/tr>\n<tr>\n<td><b>67<b><\/td>\n<td>E.3 Using formulas out of their range of applicability  <\/td>\n<\/tr>\n<tr>\n<td><b>68<b><\/td>\n<td>Annex F (informative)Techniques \/ methods for safety analysis  <\/td>\n<\/tr>\n<tr>\n<td><b>71<b><\/td>\n<td>Annex G (informative)Key system safety roles and responsibilities  <\/td>\n<\/tr>\n<tr>\n<td><b>75<b><\/td>\n<td>Annex ZZ(informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2008\/57\/EC  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Railway Applications. The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) &#8211; Systems Approach to Safety<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2017<\/td>\n<td>80<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":248220,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-248214","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/248214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/248220"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=248214"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=248214"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=248214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}