<s>
Fourier	B-General_Concept
amplitude	I-General_Concept
sensitivity	I-General_Concept
testing	I-General_Concept
(	O
FAST	O
)	O
is	O
a	O
variance-based	O
global	O
sensitivity	O
analysis	O
method	O
.	O
</s>
<s>
FAST	O
is	O
more	O
efficient	O
to	O
calculate	O
sensitivities	O
than	O
other	O
variance-based	O
global	O
sensitivity	O
analysis	O
methods	O
via	O
Monte	B-Algorithm
Carlo	I-Algorithm
integration	I-Algorithm
.	O
</s>
<s>
A	O
FORTRAN	B-Application
computer	O
program	O
capable	O
of	O
analyzing	O
either	O
algebraic	O
or	O
differential	O
equation	O
systems	O
was	O
published	O
in	O
1982	O
.	O
</s>
<s>
In	O
1990s	O
,	O
the	O
relationship	O
between	O
FAST	O
sensitivity	O
indices	O
and	O
Sobol	O
’s	O
ones	O
calculated	O
from	O
Monte-Carlo	B-Algorithm
simulation	I-Algorithm
was	O
revealed	O
in	O
the	O
general	O
framework	O
of	O
ANOVA-like	O
decomposition	O
and	O
an	O
extended	O
FAST	O
method	O
able	O
to	O
calculate	O
sensitivity	O
indices	O
referring	O
to	O
“	O
total	O
effect	O
”	O
was	O
developed	O
.	O
</s>
<s>
Sensitivity	O
indices	O
of	O
a	O
variance-based	O
method	O
are	O
calculated	O
via	O
ANOVA-like	O
decomposition	O
of	O
the	O
function	O
for	O
analysis	O
.	O
</s>
<s>
One	O
way	O
to	O
calculate	O
the	O
ANOVA-like	O
decomposition	O
is	O
based	O
on	O
multiple	O
Fourier	O
series	O
.	O
</s>
