Description: The weighted sum model is a technique used in model optimization that allows combining multiple criteria into a single score by assigning different weights to each of them. This approach is particularly useful in situations where complex decisions involving multiple factors must be made, as it facilitates the comparison and prioritization of alternatives. The essence of the model lies in the idea that not all criteria hold the same importance; therefore, they are assigned weights that reflect their relative significance. The final score is obtained by summing the products of each criterion by its corresponding weight, allowing for a composite measure that can be used to evaluate and select options. This model is widely used in various disciplines, including operations research, economics, and business decision-making, due to its ability to simplify complex problems and provide a quantitative basis for decision-making. Its flexibility and adaptability make it a valuable tool in model optimization, enabling analysts and decision-makers to address multifaceted problems in a structured and efficient manner.