Résumé
Feature location is the process of finding or locating a segment of code that implements a specific software function (i.e., feature). Feature location in a collection of software variants is an important step for transition from ad-hoc development to systematic development (software product line engineering). In this chapter, we present in a pedagogical order the concept of feature location, types of feature location and feature location in the software variants. Then, we present an illustrative approach for feature location based on information retrieval (IR).