Legacy modernization

Modernize and scale

Infosys Legacy Modernization solution provides enhanced flexibility by modernizing and migrating legacy systems, architectures and processes. It brings down the cost of running a business and fuels growth.

Your legacy systems, architectures and processes may be slowing you down

A significant part of the world's data resides in mainframes and is accessed by COBOL systems. CIOs and IT managers responsible for mainframe-based enterprise applications face challenges such as:

  • High cost of maintaining and upgrading legacy systems
  • Risks associated with running business-critical applications on potentially unsupported hardware and software
  • Inflexible and closed architectures hindering Web-enabling and integration with contemporary platforms
  • Tightly coupled business processes that prevent you from adapting to changing business requirements
  • Longer time to market resulting from complex development life cycles and a lack of productivity tools
  • Demographic issues relating to shrinking labor pool expertise on legacy systems
  • Higher SLA time for customers due to non-real-time architecture (i.e., batch systems) options
Legacy: retire, manage or transform?

Infosys has done extensive research to identify rectification techniques. To compare these techniques, we have formulated a framework to evaluate the risks vs. benefits of each of these techniques. (See table)

Technique Description
Re-hosting Non-invasive approach towards deploying legacy application on a contemporary platform to reduce high maintenance cost of applications on legacy platforms
Re-engineering Rebuilding legacy applications on new technology / platform with the same or enhanced business functionality in a service-oriented architecture
Integration Unlocking of data in a service-oriented approach from closed architecture legacy systems to provide new access channels
Package implementation Legacy applications are replaced with modern, off-the-shelf packages or ERP software
Infosys' Legacy Modernization methodology

We believe that none of the above techniques is a one-size-fits-all solution for the entire application portfolio. The task of balancing the risks vs. benefits involves careful analysis of the application portfolio and arriving at a mix-and-match modernization strategy. Infosys has generated IP around strategies for modernization.

Infosys Legacy Modernization methodology consists of two broad phases: assessment and enactment.


  • Reduced cost: lowers high maintenance cost of existing legacy platforms, resulting in substantial savings in IT budgets
  • Enhanced flexibility: creates a flexible IT environment with new architectural paradigms such as SOA, and aligns IT systems to dynamic business needs
  • Minimized disruption: eases risk in modernizing legacy platforms by combining the experience of working on legacy systems for more than two decades with contemporary platforms, a proven modernization framework and rich domain knowledge

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