Legacy systems continue to play an important role in the implementation of information systems in organisations. Many large organisations still rely heavily on these systems in delivering critical services. Legacy systems are important assets of organisations as they contain important business logics and data over several years. Although these systems are critical to the business yet organisations have to face technical difficulties and unnecessary expenses in maintaining the systems. In order to continue providing quality services in line with the global changes, legacy systems need to be refreshed through modernisation. This study therefore reviewed the phases involved in legacy systems modernisation to identify gaps and their insufficiencies. It aims to provide an overall guidance to the organisations in performing legacy systems modernisation.
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Bakar et al. (2019) studied this question.
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