Gartner Research

Choose the Right Approach to Modernize Your Legacy Systems

Published: 25 April 2018

ID: G00347617

Analyst(s): Stefan Van Der Zijden , Thomas Klinect


There are many approaches to application modernization, such as rehost, replatform and replace. The approaches differ in purpose, effect, value, cost, risk and impact. Application leaders can use Gartner's evaluation process to select the best approach to solve their problem.

Table Of Contents
  • Key Challenges



  • Evaluate Legacy Systems by Understanding the Six Business and IT Drivers Behind Modernization
  • Identify the Cause of the Problem
  • Evaluate the Modernization Approaches on Their Ability to Remediate the Cause
  • Choose the Modernization Approach With Highest Effect and Value
    • Example: Risk of Skills Shortage

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