<s>
A	O
workflow	B-Application
engine	I-Application
is	O
a	O
software	B-Application
application	I-Application
that	O
manages	O
business	O
processes	O
.	O
</s>
<s>
It	O
is	O
a	O
key	O
component	O
in	O
workflow	B-Operating_System
technology	O
and	O
typically	O
makes	O
use	O
of	O
a	O
database	B-Application
server	I-Application
.	O
</s>
<s>
A	O
workflow	B-Application
engine	I-Application
manages	O
and	O
monitors	O
the	O
state	O
of	O
activities	O
in	O
a	O
workflow	B-Operating_System
,	O
such	O
as	O
the	O
processing	O
and	O
approval	O
of	O
a	O
loan	O
application	O
form	O
,	O
and	O
determines	O
which	O
new	O
activity	O
to	O
transition	O
to	O
according	O
to	O
defined	O
processes	O
(	O
workflows	B-Operating_System
)	O
.	O
</s>
<s>
A	O
workflow	B-Application
engine	I-Application
facilitates	O
the	O
flow	O
of	O
information	O
,	O
tasks	O
,	O
and	O
events	O
.	O
</s>
<s>
Workflow	B-Application
engines	I-Application
may	O
also	O
be	O
referred	O
to	O
as	O
Workflow	B-Operating_System
Orchestration	O
Engines	O
.	O
</s>
<s>
Workflow	B-Application
engines	I-Application
mainly	O
have	O
three	O
functions	O
:	O
</s>
<s>
Executing	O
condition	O
script	O
:	O
After	O
passing	O
the	O
previous	O
two	O
steps	O
,	O
the	O
workflow	B-Application
engine	I-Application
executes	O
the	O
task	O
,	O
and	O
if	O
the	O
execution	O
successfully	O
completes	O
,	O
it	O
returns	O
the	O
success	O
,	O
if	O
not	O
,	O
it	O
reports	O
the	O
error	O
to	O
trigger	O
and	O
roll	O
back	O
the	O
change	O
.	O
</s>
<s>
A	O
workflow	B-Application
engine	I-Application
is	O
a	O
core	O
technique	O
for	O
task	O
allocation	O
software	O
,	O
such	O
as	O
business	O
process	O
management	O
,	O
in	O
which	O
the	O
workflow	B-Application
engine	I-Application
allocates	O
tasks	O
to	O
different	O
executors	O
while	O
communicating	O
data	O
among	O
participants	O
.	O
</s>
<s>
A	O
workflow	B-Application
engine	I-Application
can	O
execute	O
any	O
arbitrary	O
sequence	O
of	O
steps	O
,	O
for	O
example	O
,	O
a	O
healthcare	O
data	O
analysis	O
.	O
</s>
