Abstract: S.U.M.M.I.T (Simulation Utilized for Mentoring and Measuring Integrative Thinking) to practice is a summative advanced practice nurse (APN) evaluation model using virtual simulation to assess clinical decision-making competencies of APN students. Students engage as grand round participants in an unfolding recorded patient encounter. Competence is assessed through their application of evidence-based rationales for diagnosis, diagnostics, interpretation, and care plan. S.U.M.M.I.T incorporates an objective competency-based rubric and concurrent feedback. Results demonstrate clear details of clinical reasoning, communication, diagnosis-focused care plan, patient safety, and education, allowing specific competency need mentoring by faculty.