<s>
Verification	B-Application
and	I-Application
validation	I-Application
of	I-Application
computer	I-Application
simulation	I-Application
models	I-Application
is	O
conducted	O
during	O
the	O
development	O
of	O
a	O
simulation	O
model	O
with	O
the	O
ultimate	O
goal	O
of	O
producing	O
an	O
accurate	O
and	O
credible	O
model	O
.	O
</s>
<s>
This	O
concern	O
is	O
addressed	O
through	O
verification	B-Application
and	I-Application
validation	I-Application
of	O
the	O
simulation	O
model	O
.	O
</s>
<s>
Due	O
to	O
that	O
,	O
a	O
model	O
should	O
be	O
verified	B-Application
and	O
validated	O
to	O
the	O
degree	O
needed	O
for	O
the	O
model	O
's	O
intended	O
purpose	O
or	O
application	O
.	O
</s>
<s>
The	O
verification	B-Application
and	I-Application
validation	I-Application
of	O
a	O
simulation	O
model	O
starts	O
after	O
functional	O
specifications	O
have	O
been	O
documented	O
and	O
initial	O
model	O
development	O
has	O
been	O
completed	O
.	O
</s>
<s>
Verification	B-Application
and	I-Application
validation	I-Application
is	O
an	O
iterative	O
process	O
that	O
takes	O
place	O
throughout	O
the	O
development	O
of	O
a	O
model	O
.	O
</s>
<s>
The	O
systems	O
structure	O
and	O
operation	O
should	O
also	O
be	O
verified	B-Application
with	O
users	O
of	O
the	O
actual	O
system	O
.	O
</s>
<s>
Data	O
should	O
be	O
verified	B-Application
to	O
come	O
from	O
a	O
reliable	O
source	O
.	O
</s>
<s>
Examples	O
of	O
goodness	O
of	O
fit	O
tests	O
are	O
the	O
Kolmogorov	B-General_Concept
–	I-General_Concept
Smirnov	I-General_Concept
test	I-General_Concept
and	O
the	O
chi-square	B-General_Concept
test	I-General_Concept
.	O
</s>
<s>
Statistical	O
hypothesis	O
testing	O
using	O
the	O
t-test	B-General_Concept
can	O
be	O
used	O
as	O
a	O
basis	O
to	O
accept	O
the	O
model	O
as	O
valid	O
or	O
reject	O
it	O
as	O
invalid	O
.	O
</s>
<s>
The	O
t-test	B-General_Concept
statistic	O
is	O
used	O
in	O
this	O
technique	O
.	O
</s>
<s>
Documents	O
and	O
standards	O
involving	O
verification	B-Application
and	I-Application
validation	I-Application
of	O
computational	O
modeling	O
and	O
simulation	O
are	O
developed	O
by	O
the	O
American	O
Society	O
of	O
Mechanical	O
Engineers	O
(	O
ASME	O
)	O
Verification	B-Application
and	I-Application
Validation	I-Application
(	O
V&V	O
)	O
Committee	O
.	O
</s>
