<s>
In	O
software	B-General_Concept
engineering	I-General_Concept
,	O
architecture	B-Architecture
tradeoff	I-Architecture
analysis	I-Architecture
method	I-Architecture
(	O
ATAM	B-Architecture
)	O
is	O
a	O
risk-mitigation	O
process	O
used	O
early	O
in	O
the	O
software	O
development	O
life	O
cycle	O
.	O
</s>
<s>
ATAM	B-Architecture
was	O
developed	O
by	O
the	O
Software	B-General_Concept
Engineering	I-General_Concept
Institute	O
at	O
the	O
Carnegie	O
Mellon	O
University	O
.	O
</s>
<s>
Its	O
purpose	O
is	O
to	O
help	O
choose	O
a	O
suitable	O
architecture	B-Architecture
for	O
a	O
software	O
system	O
by	O
discovering	O
trade-offs	O
and	O
sensitivity	O
points	O
.	O
</s>
<s>
ATAM	B-Architecture
is	O
most	O
beneficial	O
when	O
done	O
early	O
in	O
the	O
software	O
development	O
life-cycle	O
,	O
when	O
the	O
cost	O
of	O
changing	O
architectures	O
is	O
minimal	O
.	O
</s>
<s>
The	O
following	O
are	O
some	O
of	O
the	O
benefits	O
of	O
the	O
ATAM	B-Architecture
process	O
:	O
</s>
<s>
The	O
ATAM	B-Architecture
process	O
consists	O
of	O
gathering	O
stakeholders	O
together	O
to	O
analyze	O
business	O
drivers	O
(	O
system	O
functionality	O
,	O
goals	O
,	O
constraints	O
,	O
desired	O
non-functional	O
properties	O
)	O
and	O
from	O
these	O
drivers	O
extract	O
quality	O
attributes	O
that	O
are	O
used	O
to	O
create	O
scenarios	O
.	O
</s>
<s>
With	O
every	O
analysis	O
cycle	O
,	O
the	O
analysis	O
process	O
proceeds	O
from	O
the	O
more	O
general	O
to	O
the	O
more	O
specific	O
,	O
examining	O
the	O
questions	O
that	O
have	O
been	O
discovered	O
in	O
the	O
previous	O
cycle	O
,	O
until	O
such	O
time	O
as	O
the	O
architecture	B-Architecture
has	O
been	O
fine-tuned	O
and	O
the	O
risk	O
themes	O
have	O
been	O
addressed	O
.	O
</s>
<s>
ATAM	B-Architecture
formally	O
consists	O
of	O
nine	O
steps	O
,	O
outlined	O
below	O
:	O
</s>
<s>
Present	O
ATAM	B-Architecture
–	O
Present	O
the	O
concept	O
of	O
ATAM	B-Architecture
to	O
the	O
stakeholders	O
,	O
and	O
answer	O
any	O
questions	O
about	O
the	O
process	O
.	O
</s>
<s>
The	O
architecture	B-Architecture
is	O
then	O
evaluated	O
against	O
each	O
scenario	O
.	O
</s>
