EN 60300-3-4:2008

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General considerations for dependability specifications
  4.1 The need for dependability
  4.2 Requirements and goals
  4.3 Systems
  4.4 Demonstration of achievement of requirements
      4.4.1 Concept
      4.4.2 Activities
  4.5 Contracting for dependability
  4.6 Types of specification
  4.7 Derivation of dependability specifications
5 Dependability management
6 Availability
  6.1 General
      6.1.1 Choice of dependability characteristic
      6.1.2 Relationship between availability, reliability
            and maintainability
  6.2 Availability specifications
      6.2.1 Quantitative requirements
      6.2.2 Qualitative requirements
  6.3 Provision of availability verification and validation
      6.3.1 General
      6.3.2 Verification and validation by testing
      6.3.3 Verification and validation by analysis
7 Reliability
  7.1 General
  7.2 Reliability specification
      7.2.1 Quantitative requirements
      7.2.2 Qualitative requirements
  7.3 Reliability verification and validation
      7.3.1 General
      7.3.2 Verification and validation by testing
      7.3.3 Verification and validation by analysis
8 Maintainability
  8.1 General
  8.2 Maintainability specification
      8.2.1 Quantitative requirements
      8.2.2 Qualitative requirements
  8.3 Maintainability verification and validation
9 Maintenance support
  9.1 General
  9.2 Maintenance support specification
      9.2.1 Quantitative requirements
      9.2.2 Qualitative requirements
  9.3 Maintenance support verification and validation
Annex A (informative) Reference standards for verification
        and validation techniques
Annex B (informative) Examples of reliability, maintainability,
        maintenance support and availability requirements
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Gives guidance on specifying required dependability characteristics in product and equipment specifications, together with specifications of procedures and criteria for verification. Includes advice on specifying quantitative and qualitative reliability, maintainability and availability requirements. The main changes from the previous edition are: the concept of systems has been included and the need to specify the dependability of the system and not just the physical equipment has been stressed; the need for verification and validation of the requirement has been included; differentiation has been made between requirements, that can be measured and verified and validated, and goals, which cannot; and the content on availability, maintainability and maintenance support has been updated and expanded to similar level of detail to reliability.