<s>
Timing	B-Operating_System
failure	I-Operating_System
is	O
a	O
failure	O
of	O
a	O
process	B-Operating_System
,	O
or	O
part	O
of	O
a	O
process	B-Operating_System
,	O
in	O
a	O
synchronous	O
distributed	B-Architecture
system	I-Architecture
or	O
real-time	B-General_Concept
system	I-General_Concept
to	O
meet	O
limits	O
set	O
on	O
execution	O
time	O
,	O
message	O
delivery	O
,	O
clock	O
drift	O
rate	O
,	O
or	O
clock	O
skew	O
.	O
</s>
<s>
Asynchronous	B-Architecture
distributed	I-Architecture
systems	I-Architecture
cannot	O
be	O
said	O
to	O
have	O
timing	B-Operating_System
failures	I-Operating_System
as	O
guarantees	O
are	O
not	O
provided	O
for	O
response	O
times	O
.	O
</s>
