This document discusses the critical incident technique, which involves analyzing significant events or behaviors to evaluate performance. It defines a critical incident as one that makes a significant difference in an activity's outcome. The document outlines how to record critical incidents, including describing the context, incident details, and impact. It explains that critical incidents can involve effective or ineffective behaviors. The technique was developed to evaluate military personnel but is now used in healthcare to understand roles and solve problems. It allows analyzing interactions and patient responses. The document reviews advantages like flexibility and rich data collection, and disadvantages like reliance on memory.