Pure form mixed methods. Mixed methods under the switch strategy are of a pure form. In this strategy, qualitative methods are used to facilitate stakeholders’ clarification of their program theories. On the other hand, quantitative methods are used to assess the program theory. There is no need to modify the procedures of qualitative and quantitative methods. In other words, qualitative and quantitative methods are used in their pure forms under the switch strategy. Furthermore, the expensive part of an evaluation is the assessment side of data collection. Under this strategy, because qualitative methods do not involve collecting data for assessment, but the quantitative methods do, the methods are not both competing for assessment resources.