This document discusses checklists as an instrument for performance evaluation. It provides definitions of checklists, characteristics of effective checklists, and guidelines for constructing checklists. Checklists enable observers to note whether traits are present or absent, and consist of lists of steps, activities, or behaviors to record when incidents occur. They allow for inter-individual comparisons and provide a simple method for recording observations. However, checklists only indicate whether attributes are present or absent and have limited use for qualitative observations.