No matter how advanced the technology is, legacy systems form an integral part of the work processes. Legacy systems can be defined based on the age of the technology or its basic functionality. Irrespective of the number of existing technological advancements, there is a requirement for these basic software or hardware tools for various processes that the industry is dependent on. This is when its maintenance is at stake, for it is neither easy to find professionals who know how to work around the same nor cost-effective, given the tools that constitute it are rare and exclusively made. Sometimes, there arises a need to make changes to this legacy system.