SC Optimize

Supply Chain Optimization package in python using PuLP.

Setup

Make sure you have Python 3.6.x (or higher) installed on your system. You can download it here.

Installation

pip install scoptimize

Getting Started

Technical Documentation

The Technical Docs can be found here.

Basic Usage

from scoptimize.network import Model, Node, Flow

model = Model(name='MyModel')
model.add_object(Node(name="Factory_1", origin=True, cashflow_per_unit=-1, max_units=15))
model.add_object(Node(name="Customer_1", destination=True, min_units=10))
model.add_object(Flow(name="Factory_1__Customer_1", cashflow_per_unit=-1, max_units=15, start='Factory_1', end='Customer_1'))
model.solve()

print(model.objective) #=> 20.0

Advanced Usage

Input:

from scoptimize.network import Model, Node, Flow
from pprint import pp

model = Model(name='MyAdvancedModel')

model.add_object(Node(name="F1", origin=True, cashflow_for_use=-8, cashflow_per_unit=-1, max_units=5))
model.add_object(Node(name="F2", origin=True, cashflow_per_unit=-2, max_units=10))
model.add_object(Node(name="W1", cashflow_per_unit=-1, max_units=10))
model.add_object(Node(name="D1", destination=True, cashflow_per_unit=0, min_units=8, max_units=10))

model.add_object(Flow(name="F1_W1", cashflow_per_unit=-1, max_units=15, start='F1', end='W1'))
model.add_object(Flow(name="F2_W1", cashflow_per_unit=-1, max_units=15, start='F2', end='W1'))
model.add_object(Flow(name="W1_D1", cashflow_per_unit=-1, max_units=15, start='W1', end='D1'))

model.solve()
pp(model.get_object_stats())

Output:

{'F1': {'name': 'F1',
        'class': 'Node',
        'origin': True,
        'destination': False,
        'inflows': 0.0,
        'outflows': 0.0,
        'reflows_in': 0.0,
        'reflows_out': 0.0,
        'use': 0.0,
        'variable_cashflow': -0.0,
        'fixed_cashflow': -0.0},
 'F2': {'name': 'F2',
        'class': 'Node',
        'origin': True,
        'destination': False,
        'inflows': 0.0,
        'outflows': 8.0,
        'reflows_in': 0.0,
        'reflows_out': 0.0,
        'use': 1.0,
        'variable_cashflow': -16.0,
        'fixed_cashflow': 0.0},
 'W1': {'name': 'W1',
        'class': 'Node',
        'origin': False,
        'destination': False,
        'inflows': 8.0,
        'outflows': 8.0,
        'reflows_in': 0.0,
        'reflows_out': 0.0,
        'use': 1.0,
        'variable_cashflow': -8.0,
        'fixed_cashflow': 0.0},
 'D1': {'name': 'D1',
        'class': 'Node',
        'origin': False,
        'destination': True,
        'inflows': 8.0,
        'outflows': 0,
        'reflows_in': 0.0,
        'reflows_out': 0.0,
        'use': 1.0,
        'variable_cashflow': 0.0,
        'fixed_cashflow': 0.0},
 'F1_W1': {'name': 'F1_W1',
           'class': 'Flow',
           'reflow': False,
           'start': 'F1',
           'end': 'W1',
           'flow': 0.0,
           'use': 1.0,
           'variable_cashflow': -0.0,
           'fixed_cashflow': 0.0},
 'F2_W1': {'name': 'F2_W1',
           'class': 'Flow',
           'reflow': False,
           'start': 'F2',
           'end': 'W1',
           'flow': 8.0,
           'use': 1.0,
           'variable_cashflow': -8.0,
           'fixed_cashflow': 0.0},
 'W1_D1': {'name': 'W1_D1',
           'class': 'Flow',
           'reflow': False,
           'start': 'W1',
           'end': 'D1',
           'flow': 8.0,
           'use': 1.0,
           'variable_cashflow': -8.0,
           'fixed_cashflow': 0.0}}

Testing

Docker:

• docker build . --tag scoptimize_docker_test
• docker run scoptimize_docker_test bash ./test.sh

Local:

• python3.11 -m virtualenv venv
• source venv/bin/activate
• pip install -e .
• ./test.sh