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