Abstract: The invention relates to a computer-implemented method for preparing offer and/or order data of an object to be individualized, wherein the method comprises the following steps: providing a purchasing system having a user interface, an inventory management system and a data interface between the purchasing system and the inventory management system in a computer system; providing individualization data for individualizing the object in a storage unit of the computer system; receiving a first user input comprising object selection data of the object to be individualized via the user interface, receiving a further user input comprising at least one selected selection position for individualization data on the object to be individualized; transmitting data via the data interface after at least one of the above-mentioned steps between the purchasing system and the inventory management system, wherein the data comprise the object selection data, the at least one selected selection position.