The document discusses models of the tourism consumer purchase decision-making process. It outlines characteristics of tourism products and services like intangibility, inseparability, and heterogeneity. Factors that influence holiday decisions include both internal factors like personal motivations and external factors like recommendations and political restrictions. Models presented include the consumer decision-making framework, Wahab, Crompton & Rothfield model of consumer behavior in tourism, and Schmoll model of the travel decision process.