So advance payment invoices can be included in the original computation instead of duplicating the computation since changeset 1a763ffe4a66 renamed waiting into pending and add more states.
############### Purchase Module ############### The *Purchase Module* provides everything that is required to create and manage purchases made by the company. It adds the idea of a purchase to Tryton, and allows it to be tracked as it moves through various states from draft to done. It makes it easy to create supplier shipments for the purchase, and includes the ability to automatically create related supplier invoices. .. toctree:: :maxdepth: 2 usage/index design releases