The education community has begun to address the challenges involved in implementing CBME. Models and guidance exist to inform implementation strategies across the continuum of education, and focus on the more efficient use of resources and technology, and the use of milestones and entrustable professional activities-based frameworks. Inconsistencies in CBME definitions and frameworks remain a significant obstacle. Evolution in assessment approaches from in vitro task-based methods to in vivo integrated approaches is responsive to many of the theoretical and conceptual concerns about CBME, but much work remains to be done to bring rigour and quality to work-based assessment.

The authors analyze the challenges to using academic measures (MCAT scores and GPAs) as thresholds for admissions and, for applicants exceeding the threshold, using personal qualities for admission decisions; review the literature on using the medical school interview and other admission data to assess personal qualities of applicants; identify challenges of developing better methods of assessing personal qualities; and propose a unified system for assessment. The authors discuss three challenges to using the threshold approach: institutional self-interest, inertia, and philosophical and historical factors. Institutional self-interest arises from the potential for admitting students with lower academic credentials, which could negatively influence indicators used to rank medical schools. Inertia can make introducing a new system complex. Philosophical and historical factors are those that tend to value maximizing academic measures. The literature identifies up to 87 different personal qualities relevant to the practice of medicine, and selecting the most salient of these that can be practically measured is a challenging task. The challenges to developing better personal quality measures include selecting and operationally defining the most important qualities, measuring the qualities in a cost-effective manner, and overcoming "cunning" adversaries who, with the incentive and resourcefulness, can potentially invalidate such measures. The authors discuss potential methods of measuring personal qualities and propose a unified system of assessment that would pool resources from certification and recertification efforts to develop competencies across the continuum with a dynamic, integrated approach to assessment.

Change is ubiquitous in health care, making continuous adaptation necessary for clinicians to provide the best possible care to their patients. The authors propose that developing the capabilities of a Master Adaptive Learner will provide future physicians with strategies for learning in the health care environment and for managing change more effectively. The concept of a Master Adaptive Learner describes a metacognitive approach to learning based on self-regulation that can foster the development and use of adaptive expertise in practice. The authors describe a conceptual literature-based model for a Master Adaptive Learner that provides a shared language to facilitate exploration and conversation about both successes and struggles during the learning process.