COBOL Modernization and Migration: A Guide for 2025
Blog post from Swimm
COBOL modernization in 2025 involves a phased approach to updating legacy systems, which are crucial in sectors like finance and insurance but often hampered by outdated technology and documentation gaps. The process emphasizes a balance between maintaining system continuity and advancing technically, using tools like Swimm to automate documentation and create code maps, thus reducing the manual effort required for understanding complex codebases. Automated tools assist in mapping dependencies, extracting business logic, and updating documentation, which is crucial for safely integrating modern practices such as API enablement, containerization, and CI/CD workflows. This method allows for incremental modernization, starting with stable modules and progressing through a combination of wrapping, rehosting, and selective rewriting, ensuring that the transition minimizes risk and downtime while enhancing system clarity and manageability.