This document outlines the five stages of the consumer buying decision process: problem recognition, information search, evaluation of alternatives, purchase decision, and post-purchase decision. It describes each stage in detail, including how needs are triggered, the major information sources used in the search stage, and how satisfaction or dissatisfaction with a purchase can impact future purchase decisions and recommendations to others. The evaluation stage considers how judgments are made consciously and attributes are assessed based on beliefs. The post-purchase stages examine satisfaction levels, potential actions like repeat purchases or warnings to others, and product usage over time.