Discrete models are mathematical representations that deal with distinct, separate values rather than continuous ranges. They are often used in fields like computer science, economics, and biology to analyze systems where variables can only take on specific, individual values. For example, a model that predicts the number of customers in a store at different times of the day is a discrete model. These models can be represented using graphs, tables, or equations, making them easier to understand and analyze. Common examples include graphs, decision trees, and integer programming. Discrete models help in making predictions and decisions based on clear, quantifiable data.