# Extensions

## Production-IRP

Production-IRP

In this case, the decisions related to the production of the products are integrated with inventory and routing management.

The problem is to determine, day by day:

- the quantity to produce
- the quantity to deliver to each customer
- how to organize the routes

in order to minimize the sum of fixed and variable production costs, inventory costs and routing costs.

## Stochastic IRP

Stochastic IRP

In this case, the demand of each product is not given, but it is defined on the basis of a probability distribution.

The problem is to determine, day by day:

- the quantity to deliver to each customer
- how to organize the routes

in order to minimize the expected cost, given by the sum of inventory and routing costs.