In this chapter we present a cross-case analysis, using an adaptation of the multi-stakeholder framework for intervening in RTB seed systems (Sperling et al. 2013) (see this book s introduction and RTB 2016). We use the case studies presented in this book to identify ideas for successful RTB seed systems, summarized at the end of each section. We start by describing the types of interventions, then analyze them using the three main functions of a seed system (seed availability, seed access, and seed quality), focusing on the seed users. We then take a closer look at seed producers, policies, and multiplication techniques before concluding with recommendations (see Section 3 below). Throughout this chapter we refer to the case studies using the short names mentioned in Table 1 of the introduction