The objective and task method is the most rational and defensible of all budgeting methods. In this method, the advertiser determines the advertising objectives and then defines specific, measurable communication tasks that will need to be undertaken to achieve the desired objectives. Cost estimates are developed for each communication task in order to arrive at a total budget estimate. This method is time-consuming and complex, and as a consequence has been less widely used in practice, however, recent research suggests that more marketers are taking up this approach.