<s>
The	O
theory	B-Algorithm
of	I-Algorithm
two-level	I-Algorithm
planning	I-Algorithm
(	O
alternatively	O
,	O
Kornai	O
–	O
Liptak	O
decomposition	O
)	O
is	O
a	O
method	O
that	O
decomposes	O
large	O
problems	O
of	O
linear	B-Algorithm
optimization	I-Algorithm
into	O
sub-problems	O
.	O
</s>
<s>
It	O
is	O
an	O
alternative	O
to	O
Dantzig	B-Algorithm
–	I-Algorithm
Wolfe	I-Algorithm
decomposition	I-Algorithm
.	O
</s>
<s>
The	O
LP	B-Algorithm
problem	I-Algorithm
must	O
have	O
a	O
special	O
structure	O
,	O
known	O
as	O
a	O
block	O
angular	O
structure	O
.	O
</s>
