<s>
A	O
system	B-Application
context	I-Application
diagram	I-Application
in	O
engineering	O
is	O
a	O
diagram	O
that	O
defines	O
the	O
boundary	O
between	O
the	O
system	O
,	O
or	O
part	O
of	O
a	O
system	O
,	O
and	O
its	O
environment	O
,	O
showing	O
the	O
entities	O
that	O
interact	O
with	O
it	O
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
a	O
block	B-Application
diagram	I-Application
.	O
</s>
<s>
System	B-Application
context	I-Application
diagrams	I-Application
show	O
a	O
system	O
,	O
as	O
a	O
whole	O
and	O
its	O
inputs	O
and	O
outputs	O
from/to	O
external	O
factors	O
.	O
</s>
<s>
System	B-Application
context	I-Application
diagrams	I-Application
are	O
used	O
early	O
in	O
a	O
project	O
to	O
get	O
agreement	O
on	O
the	O
scope	O
under	O
investigation	O
.	O
</s>
<s>
Context	B-Application
diagrams	I-Application
are	O
typically	O
included	O
in	O
a	O
requirements	O
document	O
.	O
</s>
<s>
Context	B-Application
diagrams	I-Application
can	O
be	O
developed	O
with	O
the	O
use	O
of	O
two	O
types	O
of	O
building	O
blocks	O
:	O
</s>
<s>
Context	B-Application
diagrams	I-Application
can	O
also	O
use	O
many	O
different	O
drawing	O
types	O
to	O
represent	O
external	B-Application
entities	I-Application
.	O
</s>
<s>
A	O
context	B-Application
diagram	I-Application
can	O
also	O
list	O
the	O
classifications	O
of	O
the	O
external	B-Application
entities	I-Application
as	O
one	O
of	O
a	O
set	O
of	O
simple	O
categories	O
(	O
Examples	O
:	O
)	O
,	O
which	O
add	O
clarity	O
to	O
the	O
level	O
of	O
involvement	O
of	O
the	O
entity	O
with	O
regards	O
to	O
the	O
system	O
.	O
</s>
<s>
Passive	O
:	O
Static	O
external	B-Application
entities	I-Application
which	O
infrequently	O
interact	O
with	O
the	O
system	O
(	O
Examples	O
:	O
"	O
Article	O
editors	O
"	O
or	O
"	O
database	O
administrator	O
"	O
)	O
.	O
</s>
<s>
Cooperative	O
:	O
Predictable	O
external	B-Application
entities	I-Application
which	O
are	O
used	O
by	O
the	O
system	O
to	O
bring	O
about	O
some	O
desired	O
outcome	O
(	O
Examples	O
:	O
"	O
Internet	O
service	O
providers	O
"	O
or	O
"	O
shipping	O
companies	O
"	O
)	O
.	O
</s>
<s>
Autonomous	O
(	O
Independent	O
)	O
:	O
External	B-Application
entities	I-Application
which	O
are	O
separated	O
from	O
the	O
system	O
,	O
but	O
affect	O
the	O
system	O
indirectly	O
,	O
by	O
means	O
of	O
imposed	O
constraints	O
or	O
similar	O
influences	O
(	O
Examples	O
:	O
"	O
regulatory	O
committees	O
"	O
or	O
"	O
standards	O
groups	O
"	O
)	O
.	O
</s>
<s>
The	O
best	O
system	B-Application
context	I-Application
diagrams	I-Application
are	O
used	O
to	O
display	O
how	O
a	O
system	O
interoperates	O
at	O
a	O
very	O
high	O
level	O
,	O
or	O
how	O
systems	O
operate	O
and	O
interact	O
logically	O
.	O
</s>
<s>
The	O
system	B-Application
context	I-Application
diagram	I-Application
is	O
a	O
necessary	O
tool	O
in	O
developing	O
a	O
baseline	O
interaction	O
between	O
systems	O
and	O
actors	O
;	O
actors	O
and	O
a	O
system	O
or	O
systems	O
and	O
systems	O
.	O
</s>
<s>
Alternatives	O
to	O
the	O
system	B-Application
context	I-Application
diagram	I-Application
are	O
:	O
</s>
<s>
Enterprise	B-Application
data	I-Application
model	I-Application
:	O
this	O
type	O
of	O
data	B-Application
model	I-Application
according	O
to	O
Simsion	O
(	O
2005	O
)	O
can	O
contain	O
up	O
to	O
50	O
to	O
200	O
entity	O
classes	O
,	O
which	O
results	O
from	O
specific	O
"	O
high	O
level	O
of	O
generalization	O
in	O
data	B-Application
modeling	I-Application
"	O
.	O
</s>
<s>
IDEF0	O
Top	O
Level	O
Context	B-Application
Diagram	I-Application
:	O
The	O
IDEF0	O
process	O
starts	O
with	O
the	O
identification	O
of	O
the	O
prime	O
function	O
to	O
be	O
decomposed	O
.	O
</s>
<s>
This	O
function	O
is	O
identified	O
on	O
a	O
"	O
Top	O
Level	O
Context	B-Application
Diagram	I-Application
"	O
that	O
defines	O
the	O
scope	O
of	O
the	O
particular	O
IDEF0	O
analysis	O
.	O
</s>
<s>
Problem	O
Diagrams	O
(	O
Problem	O
Frames	O
)	O
:	O
In	O
addition	O
to	O
the	O
kinds	O
of	O
things	O
shown	O
on	O
a	O
context	B-Application
diagram	I-Application
,	O
a	O
problem	O
diagram	O
shows	O
requirements	O
and	O
requirements	O
references	O
.	O
</s>
<s>
Use	B-Language
case	I-Language
diagram	I-Language
:	O
One	O
of	O
the	O
Unified	B-Language
Modeling	I-Language
Language	I-Language
diagrams	O
.	O
</s>
<s>
Use	B-Language
Case	I-Language
diagrams	I-Language
represent	O
a	O
set	O
of	O
Use	O
Cases	O
,	O
which	O
are	O
textual	O
descriptions	O
of	O
how	O
an	O
actor	O
achieves	O
the	O
goal	O
of	O
a	O
use	O
case	O
.	O
</s>
<s>
ArchiMate	B-Architecture
:	O
ArchiMate	B-Architecture
is	O
an	O
open	O
and	O
independent	O
enterprise	O
architecture	O
modeling	O
language	O
to	O
support	O
the	O
description	O
,	O
analysis	O
and	O
visualization	O
of	O
architecture	O
within	O
and	O
across	O
business	O
domains	O
in	O
an	O
unambiguous	O
way	O
.	O
</s>
