Future Research
The findings raised several new research questions. First, the effect was small. Depending on the research question and context, a small effect can be of importance to informing implementation processes. How this effect size should be interpreted in terms of practical improvement of implementation outcomes is yet to be determined. One direction of thought is that the toolkit supported organizational learning by systematically designing and applying evidence-informed implementation strategies over time to manage complex systems of change. Second, to optimize the effectiveness of the ItFits-toolkit, a dismantling study can be used to determine which components of self-guided tailored implementation contributed most to the outcomes of the ItFits-toolkit. A 3-phase Multiphase Optimization Strategy [