Over the last thirty years, suggestions for how to develop defence capability have developed rapidly. However, supporting theory and structured concept development lag behind. Despite this imbalance, countries need to continuously spend resources on defence development. This study identifies central challenges in relation to the scientific perspectives and approaches needed to support the development of defence capability. The results show that the support for developing interactions between technology and social components is especially weak and that relevant supporting theories and methods from related fields are not considered. This study also shows that it is important to be able to address these questions from various perspectives and not to be limited by a specific scientific tradition. Finally, this study also identifies a possible emerging cluster of reports on capability-related research that provide a base for a much-needed cross-disciplinary approach to the development of defence capability.