In this article the conceptual power of Dooyeweerdian philosophy for designing technology is reviewed. It is shown that the philosophical richness of the theory of modal aspects, the theory of individuality structures, and the theory of ground motives has to be disclosed to engineers in order to apply them in their daily practice. The Triple I model has been developed with engineers in a dialogical process. This model takes user practice as a starting point and analyses this practice from three different perspectives: identity or intrinsic values of the user practice; inclusion of the justified interests of stakeholders, and the ideals, dreams and values that co-shape designs. Other philosophical tools are the theories of modal aspects and of individuality structures. All these tools are made concrete for engineering practice by means of schemes, drawings, design questions, moral standards, check-off lists and design heuristics. By adopting this model, it is hoped that these tools can be fruitfully applied in engineering practice.