<s>
Operability	B-General_Concept
is	O
the	O
ability	O
to	O
keep	O
a	O
piece	O
of	O
equipment	O
,	O
a	O
system	O
or	O
a	O
whole	O
industrial	O
installation	O
in	O
a	O
safe	O
and	O
reliable	O
functioning	O
condition	O
,	O
according	O
to	O
pre-defined	O
operational	O
requirements	O
.	O
</s>
<s>
For	O
a	O
gas	O
turbine	O
engine	O
,	O
operability	B-General_Concept
addresses	O
the	O
installed	O
aerodynamic	O
operation	O
of	O
the	O
engine	O
to	O
ensure	O
that	O
it	O
operates	O
with	O
care-free	O
throttle	O
handling	O
without	O
compressor	O
stall	O
or	O
surge	O
or	O
combustor	O
flame-out	O
.	O
</s>
<s>
Operability	B-General_Concept
is	O
considered	O
one	O
of	O
the	O
ilities	O
and	O
is	O
closely	O
related	O
to	O
reliability	O
,	O
supportability	O
and	O
maintainability	O
.	O
</s>
<s>
Operability	B-General_Concept
also	O
refers	O
to	O
whether	O
or	O
not	O
a	O
surgical	O
operation	O
can	O
be	O
performed	O
to	O
treat	O
a	O
patient	O
with	O
a	O
reasonable	O
degree	O
of	O
safety	O
and	O
chance	O
of	O
success	O
.	O
</s>
