This book presents a research-based solution-focused applied psychology approach (SoFAP-P) that is efficient and effective in helping clients address challenges and can be applied to a wide range of psychological domains. Lessons learned from preceding psychological models, including psychoanalysis, behavioral therapy, humanistic psychology, family systems therapy and the pioneering contributions of Milton Erickson and the groundbreaking solution-focused therapy of Steve de Shazer and Insoo Kim Berg, culminate in this innovative SoFAP-P approach. Based on a thorough analysis of many solution-focused case studies, this tested and validated scientifically based protocol can be used as a learning guide to better understand the SoFAP-P, as well as the innovative qualitative methodology used to validate it. Cauffman and Weggeman show how this design science research (DSR) methodology is used to design, test and validate a generic set of actions that yield interventions to effectively apply to solution-focused client cases. The book demonstrates the importance of SoFAP-P to both psychological science and society and offers a glimpse into its growing potential as an intervention model. Those interested in the field of DSR will benefit from the overview of one of the first applications of DSR methodology in the psychological sciences, as well as students and academics in applied psychology.