BS 5760-15:1995

Committees responsible
National foreword
Guide
Introduction
1 Scope
2 Normative references
3 Definitions
4 Symbols and abbreviations
5 General
6 Assumptions
7 Development of state-transition diagrams
8 Evaluation of state-transition diagrams
9 Simplifications and approximations
10 Collapsed state-transition diagram
11 Reliability and availability expressions for system
     configurations
12 Presentation of results
Annexes
A (informative) Example: Numerical evaluation of some
     dependability measures of a two-unit active
     redundant system
B (informative) Tables of reliability and
     availability expressions for basic system
     configuration
C (informative) Bibliography
Tables
B.1 Reliability, R(t), and mean time to failure, MTTF,
     of non-restorable redundant structures
B.2 Approximate mean system failure rate of restorable
     parallel redundant structures
Figures
1 State-transition diagram of a non-restorable one-
     unit system
2 State-transition diagram (simplified) of a non-
     restorable one-unit system
3 State-transition diagram for a restorable one-unit
     system
4 State-transition diagram with three states for a
     one-unit system
5 State-transition diagram when repairs may be made
     from state 2
6 State-transition diagram when direct path lambda 3
     is considered
7 State-transition diagram for the evaluation of
     reliability of a one-unit system
8 State-transition diagram for a two-unit system with
     no restorable units
9 State-transition diagram for a two-unit system with
     restorable units
10 State-transition diagram illustrating common cause
     failure
11 State-transition diagram with common cause for a
     system failure
12 State-transition diagram with only one restoration
     team
13 Reliability block diagram for a 2-out-of-4 parallel
     system
14 Collapsed state-transition diagram for the system
     in figure 13
15 Collapsed state-transition diagram for a parallel
     system (four units)
A.1 State-transition diagram for a two-unit system
A.2 State-transition diagram of a system with two
     identical units

Gives advice on the application of Markov techniques to dependability analysis. Coverage includes: symbols and abbreviations; development of state-transition diagrams; simplifications and approximations; reliability and availability expressions for system configurations. Also gives definitions, tables, diagrams and annexes.