BS EN 61078:2016 - Reliability block diagrams

BS EN 61078:2016

Reliability block diagrams

Status : Current   Published : December 2016



IEC 61078:2016 this International Standard describes:

- the requirements to apply when reliability block diagrams (RBDs) are used in dependability analysis;

- the procedures for modelling the dependability of a system with reliability block diagrams;

- how to use RBDs for qualitative and quantitative analysis;

- the procedures for using the RBD model to calculate availability, failure frequency and reliability measures for different types of systems with constant (or time dependent) probabilities of blocks success/failure, and for non-repaired blocks or repaired blocks;

- some theoretical aspects and limitations in performing calculations for availability, failure frequency and reliability measures;

- the relationships with fault tree analysis (see IEC 61025) and Markov techniques (see IEC 61165). This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:

- the structure of the document has been entirely reconsidered, the title modified and the content extended and improved to provide more information about availability, reliability and failure frequency calculations;

- Clause 3 has been extended and clauses have been introduced to describe the electrical analogy, the "non-coherent" RBDs and the "dynamic" RBDs;

- Annex B about Boolean algebra methods has been extended;

- Annex C (Calculations of time dependent probabilities), Annex D (Importance factors), Annex E (RBD driven Petri net models) and Annex F (Numerical examples and curves) have been introduced. Keywords: reliability block diagram (RBD)

Standard NumberBS EN 61078:2016
TitleReliability block diagrams
Publication Date31 December 2016
Normative References(Required to achieve compliance to this standard)EN 61703, IEC 61703, IEC 60050-192
Informative References(Provided for Information)EN 61508:2010, IEC 61511:2016, ISO/TR 12489, IEC 61165, EN 62551, EN 61025, IEC 61508:2010, EN 61511:2016, CEN ISO/TR 12489, IEC 61025, EN 60812, IEC 62551, EN 61165, IEC 60812
ReplacesBS EN 61078:2006
International RelationshipsEN 61078:2016,IEC 61078:2016
Draft Superseded By15/30310506 DC
DescriptorsAvailability, Block diagrams, Management techniques, Mathematical analysis, Symbols, Mathematical models, Reliability, Systems analysis, Formulae (mathematics), Systemology, Performance, Components, Boolean algebra, Management, Quality assurance, Analysis, Graphical methods, Quality control
Title in FrenchDiagrammes de fiabilité
Title in GermanZuverlässigkeitsblockdiagramme
ISBN978 0 580 87533 5
File Size3.891 MB

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