<s>
Risk-based	B-General_Concept
testing	I-General_Concept
(	O
RBT	O
)	O
is	O
a	O
type	O
of	O
software	O
testing	O
that	O
functions	O
as	O
an	O
organizational	O
principle	O
used	O
to	O
prioritize	O
the	O
tests	O
of	O
features	O
and	O
functions	O
in	O
software	O
,	O
based	O
on	O
the	O
risk	O
of	O
failure	O
,	O
the	O
function	O
of	O
their	O
importance	O
and	O
likelihood	O
or	O
impact	O
of	O
failure.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx1	O
In	O
theory	O
,	O
there	O
are	O
an	O
infinite	O
number	O
of	O
possible	O
tests	O
.	O
</s>
<s>
Risk-based	B-General_Concept
testing	I-General_Concept
uses	O
risk	O
(	O
re	O
-	O
)	O
assessments	O
to	O
steer	O
all	O
phases	O
of	O
the	O
test	O
process	O
,	O
i.e.	O
,	O
test	O
planning	O
,	O
test	O
design	O
,	O
test	O
implementation	O
,	O
test	O
execution	O
and	O
test	O
evaluation	O
.	O
</s>
<s>
This	O
includes	O
for	O
instance	O
,	O
ranking	O
of	O
tests	O
,	O
and	O
subtests	O
,	O
for	O
functionality	O
;	O
test	O
techniques	O
such	O
as	O
boundary-value	O
analysis	O
,	O
all-pairs	O
testing	O
and	O
state	B-Application
transition	I-Application
tables	I-Application
aim	O
to	O
find	O
the	O
areas	O
most	O
likely	O
to	O
be	O
defective	O
.	O
</s>
<s>
Regression	O
testing	O
ensures	O
that	O
a	O
change	O
,	O
such	O
as	O
a	O
bug	B-Error_Name
fix	O
,	O
did	O
not	O
introduce	O
new	O
faults	O
into	O
the	O
software	O
under	O
test	O
.	O
</s>
<s>
Risk	O
can	O
be	O
identified	O
as	O
the	O
probability	O
that	O
an	O
undetected	O
software	B-Error_Name
bug	I-Error_Name
may	O
have	O
a	O
negative	O
impact	O
on	O
the	O
user	O
of	O
a	O
system	O
.	O
</s>
