Team decision support is an active area of research. Its use is growing over time and is likely to continue, as there is no lack of issues that are complex in both an analytical and a social sense. For future growth, it is necessary to continue adapting methods to new circumstances and train new generations in team decision support. This in turn requires combining research and interventions. Comparing these approaches reveals similarities and differences. Researchers as well as interventionists aim to create insights that are empirically grounded and analytically sound, but the latter places greater emphasis on creating actionable plans. Research into interventions helps to clarify what works and why, which is relevant not only to practitioners and clients but also to researchers that seek to develop methods further. Academics who are also practitioners want to report applications and method development in peer-reviewed journals. Clarity on how intervention research is similar or different to other types of research helps to motivate methodological choices. After contrasting intervention research to other forms of research, this chapter turns to evaluating team decision support interventions. This chapter closes with further guidance on how to become a competent practitioner in team decision support.