Method 
Kind of method 
Events at the beginning 
Failures combination 
Figure aids

Advantages 
Disadvantages 

in duc tive 
de duc tive 
mix ed 

Failure modes and Effects 
yes 


Ways of failure of components 
no 
Analytical tableaux 
give a first list of defects can be developed under some classification of failures 
non quantitative can be too long just for simple defects 
Diagram of Success 

yes 

Functions of the systems 
yes 
Diagrams of successes 
can be deduced from functional diagram, liability calculus, repair calculus 
not proper for complex situations, nor complex maintenance treatments 
Causal Tree 
yes 


Ways of failure of components 
yes 
Tree of causes 
allows to identify all causes lead to a given failure, shows some hidden relations, wide applicability 
too huge tree hard to examine, some gaps in complex systems or complex maintenance systems 
Table of truth 

yes 

Undesirable events 
yes multiphase 
Table of truth 
study systematically all combinations of failure, probability calculus, other then bi 
for system with few components, not for complex relations, not for repairing systems 
Summarize of breakdown combination 
yes 


Event of the beginning 
yes multiphase 
Tree of consequences 
identify any abnormal functionning, detailed analysis of failures, study of interacting subsystems 
difficult and can be very long, not for too sequential systems, not much for quantitative analysis 
Tree of Conse quences 
yes 


Ways of failure of components 
yes 

identify all consequences of a generic event, shows interactions, possible quantitative simulations 
non exhaustive, needs other methods for analyzing generic events, not for complex systems 
Causes Conse quences diagrams 


yes 
Event of the beginning 
yes 
Causes consequences diagrams 
simultaneous study of causes and consequences, shows dependant relations between causes and consequences 
not for complex systems, in some ways specific 
Space of States 
yes 


Working and breakdown states of the systems 
yes multiphase 
Graph of states 
identify all states of functioning and break down, quantitative measures of liability, availability 
can turns very complex, easier just for markovian and halfmarkovian processes. 
Source: nfm 