100-Metodos-de-Qualidade-Total

96 100 METHODS FOR TOTAL QUALITY MANAGEMENT
Method 38
Fault tree analysis
Purpose
To perform a quantitative as well as qualitative analysis of a complex
system.
When to use
When you want to illustrate the connection between a non-desired
occurrence on the system level and the causes of this occurrence on a lower
system level.
How to use
Design of the fault tree begins by specifying the non-desired occurrence.
The immediate cause of this event then has to be connected with the
necessary sequence. This procedure is repeated until a basic fault occurrence
level is reached.
Benefits
It helps to increase understanding of the formation and reliability of the
system. It also helps to detect critical failure modes even when the
component data are not available.
Cable
broken
Left brake
pad worn
Right wheel:
B no brake
action
cE0
Cable
broken
Right
brake
pad worn
Figure 1
Fault tree analysis