<s>
Knowledge	B-General_Concept
Acquisition	I-General_Concept
and	I-General_Concept
Documentation	I-General_Concept
Structuring	I-General_Concept
(	O
KADS	O
)	O
is	O
a	O
structured	O
way	O
of	O
developing	O
knowledge-based	B-General_Concept
systems	I-General_Concept
(	O
expert	B-Application
systems	I-Application
)	O
.	O
</s>
<s>
It	O
was	O
developed	O
at	O
the	O
University	O
of	O
Amsterdam	O
as	O
an	O
alternative	O
to	O
an	O
evolutionary	O
approach	O
and	O
is	O
now	O
accepted	O
as	O
the	O
European	O
standard	O
for	O
knowledge	B-General_Concept
based	I-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
KADS	O
was	O
further	O
developed	O
into	O
CommonKADS	B-General_Concept
.	O
</s>
<s>
A	O
study	O
carried	O
out	O
in	O
1989	O
showed	O
that	O
the	O
main	O
reason	O
why	O
expert	B-Application
systems	I-Application
were	O
not	O
being	O
used	O
was	O
an	O
insufficiency	O
of	O
methods	O
for	O
development	O
,	O
especially	O
in	O
the	O
construction	O
of	O
knowledge	O
bases	O
,	O
e.g.	O
</s>
<s>
Knowledge	B-General_Concept
Based	I-General_Concept
Systems	I-General_Concept
Analysis	O
and	O
Design	O
Support	O
(	O
KADS	O
)	O
originating	O
in	O
the	O
European	O
ESPRIT	O
project	O
P1098	O
and	O
representing	O
75	O
person-years	O
of	O
work	O
,	O
was	O
one	O
of	O
the	O
most	O
highly	O
developed	O
KBs	O
(	O
Knowledge	B-General_Concept
Based	I-General_Concept
Systems	I-General_Concept
)	O
in	O
the	O
early	O
90s	O
.	O
</s>
