Converting Outdated Software

The goal of this paper is to present a methodology for rewriting outdated software systems. We developed this method based on a work assignment from the company SSAB AB, where we were tasked with rewriting one of their outdated systems to fit modern standards. This paper discusses the reasons for rewriting outdated systems, and the steps of planning, analysing source code, the rewriting procedure, documenting the rewritten code, and evaluating it. By using the method we developed, we were able to produce a satisfactory rewritten application for SSAB, and believe that it can be reused for similar purposes in the future