lotsizing_lazy Namespace Reference

Classes
class	Conshdlr_sils

Functions
def	mk_example ()
def	sils (T, f, c, d, h)
def	sils_cut (T, f, c, d, h, conshdlr)

Variables
	c
	conshdlr = Conshdlr_sils()
	d
	f
	h
	I
def	model = sils(T, f, c, d, h)
	T
	x
	y

Function Documentation

mk_example()

def lotsizing_lazy.mk_example

(

)

mk_example: book example for the single item lot sizing

Definition at line 134 of file lotsizing_lazy.py.

References pyscipopt.Multidict.multidict().

sils()

def lotsizing_lazy.sils	(		T,
			f,
			c,
			d,
			h
	)

sils -- LP lotsizing for the single item lot sizing problem
Parameters:
    - T: number of periods
    - P: set of products
    - f[t]: set-up costs (on period t)
    - c[t]: variable costs
    - d[t]: demand values
    - h[t]: holding costs
Returns a model, ready to be solved.

Definition at line 59 of file lotsizing_lazy.py.

sils_cut()

def lotsizing_lazy.sils_cut	(		T,
			f,
			c,
			d,
			h,
			conshdlr
	)

solve_sils -- solve the lot sizing problem with cutting planes
   - start with a relaxed model
   - used lazy constraints to elimitate fractional setup variables with cutting planes
Parameters:
    - T: number of periods
    - P: set of products
    - f[t]: set-up costs (on period t)
    - c[t]: variable costs
    - d[t]: demand values
    - h[t]: holding costs
Returns the final model solved, with all necessary cuts added.

Definition at line 92 of file lotsizing_lazy.py.

References sils().

Variable Documentation

c

c

Definition at line 149 of file lotsizing_lazy.py.

conshdlr

conshdlr = Conshdlr_sils()

Definition at line 160 of file lotsizing_lazy.py.

d

d

Definition at line 149 of file lotsizing_lazy.py.

f

f

Definition at line 149 of file lotsizing_lazy.py.

h

h

Definition at line 149 of file lotsizing_lazy.py.

I

I

Definition at line 152 of file lotsizing_lazy.py.

model

def model = sils(T, f, c, d, h)

Definition at line 151 of file lotsizing_lazy.py.

T

T

Definition at line 149 of file lotsizing_lazy.py.

x

x

Definition at line 152 of file lotsizing_lazy.py.

y

y

Definition at line 152 of file lotsizing_lazy.py.