Systems and methods are provided for planning demand of products, such as configurable products. In one embodiment, a method is provided for planning demand for a configurable product in a managed supply chain. In another embodiment, a demand planner is provided for planning demand for a configurable product in a managed supply chain. The method may comprise the steps of: storing master data defining a set of characteristic value combinations relating to the product dependent characteristics of each product; inputting transactional data defining a demand plan with respect to a product or component; specifying at least one product dependent characteristic of one or more products for which an additional characteristic value is to be assigned; automatically generating the additional characteristic value identifying the specified characteristics; and storing the additional characteristic value to the characteristic value combinations in the master data.