Tryton application platform - sale shipment tolerance module

 Tryton is a high-level general purpose application platform. It is the base
 of a complete business solution as well as a comprehensive health and hospital
 information system (GNUHealth).
 .
 The sale_shipment_tolerance modules adds under and over shipment tolerance on
 the sale.
 If the quantity of a sale line is under shipped but inside the tolerance
 percentage, then the line will be considered as fully shipped and no back-order
 will be created.
 If the quantity of a sale line is over shipped more than the tolerance
 percentage, then a warning is raised.