RESUMEN

Incremental changes add new functionality and new properties to software. They are the basis of software maintenance, evolution, incremental development, agile development, and other important software engineering processes. This article presents selected incremental change activities—change request, concept extraction, concept location, impact analysis, actualization, incorporation, change propagation, refactoring, and role splitting—in which programming concepts and program dependencies play a key role. The authors provide an example that illustrates an incremental change in the open source software Drawlets.