<s>
In	O
information	B-General_Concept
technology	I-General_Concept
,	O
virtual	B-Application
chargeback	I-Application
is	O
a	O
practice	O
of	O
charging	O
back	O
the	O
costs	O
of	O
virtual	O
IT	B-Application
infrastructure	I-Application
to	O
departments	O
or	O
business	O
units	O
,	O
that	O
actually	O
use	O
it	O
.	O
</s>
<s>
This	O
means	O
analyzing	O
and	O
recording	O
the	O
resource	O
utilisation	O
on	O
virtual	B-Architecture
machines	I-Architecture
(	O
VMs	O
)	O
.	O
</s>
<s>
Virtual	B-Application
chargeback	I-Application
can	O
be	O
a	O
particularly	O
difficult	O
process	O
to	O
implement	O
,	O
due	O
to	O
the	O
use	O
of	O
shared/common	O
resources	O
.	O
</s>
<s>
•	O
The	O
entire	O
IT	B-Application
infrastructure	I-Application
is	O
taken	O
into	O
account	O
(	O
i.e.	O
</s>
<s>
While	O
numerous	O
tools	O
exist	O
for	O
tracking	O
asset	O
utilisation	O
in	O
a	O
traditional	O
sense	O
(	O
such	O
as	O
Microsoft	B-General_Concept
's	I-General_Concept
Operations	I-General_Concept
Manager	I-General_Concept
)	O
,	O
they	O
are	O
considered	O
by	O
some	O
to	O
be	O
of	O
limited	O
use	O
when	O
it	O
comes	O
to	O
virtual	B-Architecture
machines	I-Architecture
.	O
</s>
