<s>
IT	B-Application
as	I-Application
a	I-Application
service	I-Application
(	O
ITaaS	B-Application
)	O
is	O
an	O
operational	O
model	O
where	O
the	O
information	B-General_Concept
technology	I-General_Concept
(	O
IT	O
)	O
service	O
provider	O
delivers	O
an	O
information	B-General_Concept
technology	I-General_Concept
service	O
to	O
a	O
business	O
.	O
</s>
<s>
The	O
recipients	O
of	O
ITaaS	B-Application
can	O
be	O
a	O
line	O
of	O
business	O
(	O
LOB	O
)	O
organization	O
within	O
an	O
enterprise	O
or	O
a	O
small	O
and	O
medium	O
business	O
(	O
SMB	O
)	O
.	O
</s>
<s>
The	O
information	B-General_Concept
technology	I-General_Concept
is	O
typically	O
delivered	O
as	O
a	O
managed	O
service	O
with	O
a	O
clear	O
IT	O
services	O
catalog	O
and	O
pricing	O
associated	O
with	O
each	O
of	O
the	O
catalog	O
items	O
.	O
</s>
<s>
At	O
its	O
core	O
,	O
ITaaS	B-Application
is	O
a	O
competitive	O
business	O
model	O
where	O
businesses	O
have	O
many	O
options	O
for	O
IT	O
services	O
and	O
the	O
internal	O
IT	O
organization	O
has	O
to	O
compete	O
against	O
those	O
other	O
external	O
options	O
in	O
order	O
to	O
be	O
the	O
selected	O
IT	O
service	O
provider	O
to	O
the	O
business	O
.	O
</s>
<s>
Options	O
for	O
providers	O
other	O
than	O
the	O
internal	O
IT	O
organization	O
may	O
include	O
IT	B-Architecture
outsourcing	I-Architecture
companies	O
and	O
public	O
cloud	O
providers	O
.	O
</s>
<s>
Under	O
an	O
ITaaS	B-Application
model	O
,	O
the	O
IT	O
service	O
provider	O
will	O
place	O
great	O
emphasis	O
on	O
the	O
needs	O
and	O
the	O
outcomes	O
required	O
by	O
the	O
business	O
to	O
improve	O
employee	O
productivity	O
and	O
improving	O
the	O
top	O
line	O
(	O
revenue	O
)	O
and	O
bottom	O
line	O
(	O
profitability	O
)	O
.	O
</s>
<s>
The	O
benefits	O
to	O
the	O
business	O
sought	O
by	O
using	O
the	O
ITaaS	B-Application
model	O
include	O
the	O
standardization	O
and	O
simplification	O
of	O
products	O
delivered	O
by	O
IT	O
,	O
improved	O
financial	O
transparency	O
and	O
more	O
direct	O
association	O
of	O
costs	O
to	O
consumption	O
,	O
and	O
increased	O
IT	O
operational	O
efficiency	O
resulting	O
from	O
the	O
need	O
to	O
compare	O
the	O
price	O
of	O
internally	O
produced	O
products	O
to	O
those	O
available	O
from	O
external	O
providers	O
.	O
</s>
<s>
The	O
transformation	O
of	O
an	O
internal	O
IT	O
organization	O
from	O
operating	O
as	O
a	O
cost-center	O
to	O
an	O
ITaaS	B-Application
model	O
is	O
also	O
believed	O
to	O
produce	O
improved	O
levels	O
of	O
business	O
agility	O
for	O
the	O
enterprise	O
as	O
a	O
whole	O
.	O
</s>
<s>
According	O
to	O
The	O
NIST	O
Definition	O
of	O
Cloud	O
Computing	O
,	O
there	O
are	O
three	O
service	O
models	O
associated	O
with	O
cloud	O
computing	O
:	O
infrastructure	B-General_Concept
as	I-General_Concept
a	I-General_Concept
service	I-General_Concept
(	O
IaaS	B-General_Concept
)	O
,	O
platform	B-Application
as	I-Application
a	I-Application
service	I-Application
(	O
PaaS	B-Application
)	O
,	O
and	O
software	B-Architecture
as	I-Architecture
a	I-Architecture
service	I-Architecture
(	O
SaaS	B-Architecture
)	O
.	O
</s>
<s>
The	O
concept	O
of	O
ITaaS	B-Application
as	O
an	O
operating	O
model	O
is	O
not	O
limited	O
to	O
or	O
dependent	O
on	O
cloud	O
computing	O
.	O
</s>
<s>
Several	O
proponents	O
of	O
ITaaS	B-Application
as	O
an	O
operating	O
model	O
will	O
insist	O
that	O
the	O
ability	O
for	O
an	O
IT	O
organization	O
to	O
deliver	O
ITaaS	B-Application
is	O
enabled	O
by	O
underlying	O
technology	O
models	O
such	O
as	O
IaaS	B-General_Concept
,	O
PaaS	B-Application
,	O
and	O
SaaS	B-Architecture
.	O
</s>
<s>
Vendors	O
who	O
are	O
proponents	O
of	O
the	O
concept	O
of	O
ITaaS	B-Application
as	O
an	O
operating	O
model	O
include	O
EMC	O
,	O
Citrix	O
,	O
and	O
VMware	O
.	O
</s>
<s>
ITaaS	B-Application
is	O
not	O
a	O
technology	O
shift	O
-	O
such	O
as	O
a	O
move	O
to	O
increase	O
the	O
use	O
of	O
virtualization	B-General_Concept
.	O
</s>
<s>
IT	O
organizations	O
that	O
adopt	O
ITaaS	B-Application
are	O
most	O
likely	O
to	O
use	O
the	O
best	O
practices	O
for	O
IT	O
service	O
management	O
as	O
defined	O
in	O
ITIL	O
.	O
</s>
<s>
Several	O
vendors	O
who	O
are	O
proponents	O
of	O
ITaaS	B-Application
describe	O
the	O
transition	O
of	O
an	O
IT	O
organization	O
to	O
the	O
ITaaS	B-Application
model	O
as	O
a	O
journey	O
which	O
includes	O
the	O
adoption	O
of	O
such	O
models	O
as	O
:	O
</s>
<s>
New	O
consumption	O
models	O
leveraging	O
self-service	O
catalogs	O
offering	O
both	O
internal	O
and	O
external	O
services	O
;	O
providing	O
IT	O
financial	O
transparency	O
for	O
costs	O
and	O
pricing	O
;	O
offering	O
consumerized	B-General_Concept
IT	I-General_Concept
–	O
such	O
as	O
bring	O
your	O
own	O
device	O
(	O
BYoD	O
)	O
–	O
to	O
meet	O
the	O
needs	O
of	O
users	O
.	O
</s>
<s>
Business	O
driven	O
IT	O
solution	O
is	O
represented	O
as	O
a	O
repeatable	O
business	O
activity	O
having	O
a	O
specified	O
outcome	O
,	O
wherein	O
service	O
acts	O
as	O
a	O
self-contained	O
logical	O
unit	O
,	O
may	O
be	O
composed	O
of	O
other	O
services	O
(	O
choreography	O
)	O
,	O
is	O
generally	O
a	O
"	O
black	B-Device
box	I-Device
"	O
to	O
typical	O
consumers	O
while	O
highly	O
transparent	O
to	O
leadership	O
.	O
</s>
