SN EN 50128 : 2001

Introduction
1 Scope
2 Normative references
3 Definitions
4 Objectives and conformance
5 Software safety integrity levels
    5.1 Objective
    5.2 Requirements
6 Personnel and responsibilities
    6.1 Objective
    6.2 Requirements
7 Life cycle issues and documentation
    7.1 Objective
    7.2 Requirements
8 Software Requirements Specification
    8.1 Objectives
    8.2 Input documents
    8.3 Output documents
    8.4 Requirements
9 Software architecture
    9.1 Objectives
    9.2 Input documents
    9.3 Output documents
    9.4 Requirements
10 Software design and implementation
    10.1 Objectives
    10.2 Input documents
    10.3 Output documents
    10.4 Requirements
11 Software verification and testing
    11.1 Objective
    11.2 Input documents
    11.3 Output documents
    11.4 Requirements
12 Software/hardware integration
    12.1 Objectives
    12.2 Input documents
    12.3 Output documents
    12.4 Requirements
13 Software validation
    13.1 Objective
    13.2 Input documents
    13.3 Output documents
    13.4 Requirements
14 Software assessment
    14.1 Objective
    14.2 Input documents
    14.3 Output documents
    14.4 Requirements
15 Software quality assurance
    15.1 Objectives
    15.2 Input documents
    15.3 Output documents
    15.4 Requirements
16 Software maintenance
    16.1 Objective
    16.2 Input documents
    16.3 Output documents
    16.4 Requirements
17 Systems configured by application data
    17.1 Objectives
    17.2 Input documents
    17.3 Output documents
    17.4 Requirements
Annex A (normative) Criteria for the selection of
                      techniques and measures
Annex B (informative) Bibliography of techniques

Provides procedures and technical requirements for the development of programmable electronic systems for use in railway control and protection applications. Aimed at use in any area where there are safety implications. Applicable exclusively to software and the interaction between software and the system of which it is part. Applies to all software used in development and implementation of railway control and protection systems including: application programming, operating systems, support tools, firmware.