Industrial Perception of Legacy Software System and their Modernization

Research in legacy system modernization has traditionally focused on its technical challenges, and takes the standpoint that legacy systems are obsolete systems, yet they are crucial for an organization's operation. Nonetheless, it remains unclear whether practitioners in the industry also share this perception. This paper describes the outcome of an exploratory study in which 26 practitioners from the industry are interviewed on what makes a software system a legacy system, what the main drivers are leading to the modernization of such systems, and what challenges are faced during the modernization process. The findings of the interviews have been validated by means of a survey with 198 respondents. As it turns out, practitioners value their legacy systems highly, the challenges they face are not just technical, but also include business and organizational aspects