Description: Fault localization is the process of identifying the location of faults in a software system. This process is fundamental in the software development lifecycle, as it allows developers and testers to detect and correct errors that can affect performance, functionality, and user experience. Fault localization involves the use of various techniques and tools that help isolate and diagnose problems in the code, as well as in the interactions between different components of the system. Key characteristics of this process include systematicity, as a methodical approach is required to identify the root of the problem, and precision, which is crucial to ensure that the correct faults are addressed. The relevance of fault localization lies in its direct impact on software quality; error-free software not only enhances user satisfaction but also reduces costs associated with maintenance and updates. In an environment where agility and speed in development are essential, fault localization becomes an indispensable practice to ensure the delivery of high-quality products.