SDI stands for Strengths Deployment Inventory. It is a self-assessment tool that helps individuals and teams understand their strengths and how they can be effectively utilized in different situations. The SDI is based on Relationship Awareness Theory, which focuses on understanding and valuing different motivations and behaviors in order to improve communication and collaboration. The inventory measures an individual's motivational value system, which consists of three core motives: relating, influencing, and asserting. By understanding their own and others' motivational values, individuals can enhance their interpersonal relationships and work more effectively as a team.