1. A method of processing transactional data for use in accordance with a decision support operation, comprising the steps of: transforming the transactional data into an interim form according to a relative importance of the transactional data to the decision support operation; and incrementally analyzing the transformed data, wherein the incremental analysis comprises applying a successive approximation to the data in the interim form, such that the decision support operation can be incrementally performed based on a transactional load.