An effective strategy for legacy systems evolution

Abstract

A large number of organizations depend on the business‐critical information systems for their daily activities that have been developed over the last two decades or more. These systems are called Legacy Information Systems (LISs). They mostly run on old software and hardware technology tools and environments. They are hard to modify, expensive to maintain and difficult to integrate with new technology tools and programs. They need to be evolved into modern environments. The LIS modernization is a long outstanding problem of the IT community. This paper presents a classification of current approaches to this problem and suggests guidelines and a methodology for an optimal solution based on many years of professional experiences of the authors in this area. Parts of this methodology have been implemented and tested in many migration projects and they have proven to be effective. This approach optimizes the time, the human resources and the global costs and reduces the risk factors and side effects of renovation projects by developing migration tools once per platform. Copyright © 2003 John Wiley & Sons, Ltd.

Evaluating legacy system migration technologies through empirical studies

“…During the years, several approaches have been presented to migrate monolithic and procedural legacy systems to different distributed architectures, including client server architectures [10,12], distributed objects architectures [35,41], and web-based and service oriented architectures [2,3,7,13,30,42]. These approaches share some commonalities in the used reverse engineering and reengineering methods.…”

The legacy problem in government agencies

“…The most common managerial attitude towards legacy systems treats them largely as a technology-only problem, relegated to the IT department to resolve through back-end conversions, data translations or the development of interface wrappers [5,16], so the business side does not have to plan for or undergo any changes. In government organizations, where a large number of business-critical applications are legacy systems, the IT/business divide exemplifies a reductionist approach to systems analysis which could lead to unsuccessful software product selection or IT project failure.…”

A Multifaceted Web Services Architecture: Toward a Meta-Service Framework for Service and Composition Development

“…(2) The modernization facet indicates the guidance process for using a modernization technique among many existing ones (Baghdadi & Al-Bulushi, 2013;Canfora et al, 2008;Comella-Dorda et al, 2000;Rahgozar & Oroumchian, 2003;Lewis et al, 2008). This guidance would first locate the business functions locked within www.ccsenet.org/cis Computer and Information Science Vol.…”