A hearing device to be ordered in identified by a set (2) of data elements. Identifying data sets K[E] according to previous orders are stored (5) to such ordered data sets (K[E]) weighing values are assigned to (W[K]) which reflect the frequency of ordering hearing devices with respective data. The data set (2) of an intended order is compare with data sets of previous orders (K[E]) on the bases of a pre-established similarity criterion (#E). Similar data sets of previous orders are ranked according to the assigned weighing values (W[K]) and dispatched. The stored ordering data sets (K[E]) and the assigned weighing values (W[K]) are updated by an order for a hearing device which is placed.