Upload
sammie-williams
View
221
Download
0
Embed Size (px)
Citation preview
8/17/2019 FTA Description
1/22
FTA Description
Slides 2 through 15 are from the NASA STEP training program and used
with permission.
Slides 16‐21 are from Pat Clemens and used with permission. Slides 20
and 21 have been annotated by Herb Shivers.
8/17/2019 FTA Description
2/22
8/17/2019 FTA Description
3/22
8/17/2019 FTA Description
4/22
8/17/2019 FTA Description
5/22
8/17/2019 FTA Description
6/22
8/17/2019 FTA Description
7/22
8/17/2019 FTA Description
8/22
8/17/2019 FTA Description
9/22
8/17/2019 FTA Description
10/22
8/17/2019 FTA Description
11/22
8/17/2019 FTA Description
12/22
8/17/2019 FTA Description
13/22
8/17/2019 FTA Description
14/22
8/17/2019 FTA Description
15/22
8/17/2019 FTA Description
16/22
8/17/2019 FTA Description
17/22
8/17/2019 FTA Description
18/22
8/17/2019 FTA Description
19/22
8/17/2019 FTA Description
20/22
Note: This illustration is a success event while the
FTA we study is generally an unwanted event. We can
easily change this to an unwanted event by
redefining the events to be, light D is not on, Switch A
is off or fails, switch B is off or fails and switch C is off
or fails. (Herb Shivers)
8/17/2019 FTA Description
21/22
Note: This illustration is a success event while the
FTA we study is generally an unwanted event. We can
easily change this to an unwanted event by
redefining the events to be, light D is not on, Switch A
is off
or
fails,
switch
B
is
off
or
fails
and
switch
C
is
off
or fails. (Herb Shivers)
8/17/2019 FTA Description
22/22
Example of a More Complex FTA
Diagram
From the
ReliaSoft BlockSim Quick
Start
Guide.
The H, S, and E
events are
types
of
failure leading to
the unwanted
event at the top
and would be
known and
described by the
analyst.