The invention relates to a method of generating a demand plan for a configurable product in a managed supply chain using a computer, wherein the product comprises an assembled component. The method comprising: providing a processor device; accessing master data in a primary profile planning table for the configurable product, wherein the table includes data relating to the product, accessing master data in a secondary profile planning table for an assembled component of the configurable product including a header characteristic identifying the configurable product of which the assembled component is a component and data relating to the assembled component, processing the data in the primary profile planning table and the secondary profile planning table to generate transactional data as the demand plan taking into account the assembled component and controlling the supply of the product in accordance with the demand plan.