The Weighted Sum Model (WSM) is a decision-making tool used to evaluate multiple alternatives based on various criteria. In this model, each criterion is assigned a weight that reflects its importance, and each alternative is scored against these criteria. The overall score for each alternative is calculated by multiplying the scores by their respective weights and summing the results. WSM is commonly used in fields like operations research, management, and engineering to facilitate comparisons among options. It helps decision-makers identify the best choice by providing a clear numerical representation of how each alternative performs relative to the weighted criteria.