I have reached a kind of conundrum in planning my ERP system. I want to use OpenERP to keep track of manufacturing processes, as well as  internal purchases (office supplies, packing materials, etc). This is for a plating company, where unprocessed parts are recieved from their customers to plate, which are then sent back to the customer. Currently when I create a sales order, it generates a purchase order with the unprocessed parts that has to be recieved for the parts to be entered into the system to be used in a Manufacturing Order. However the purchases module is also being used for internal purchases. Is it possible to split the purchases module into two sections - recieving and purchasing? With my current knowledge of the system this seems like it may not work well. Any advice?