Gartner Research

Follow a Multistep Process for Deciding Whether a Migration Off the Mainframe Is Warranted

Published: 22 May 2013

ID: G00251621

Analyst(s): Mike Chuba


Migration off the mainframe may or may not be the right decision for your organization. Infrastructure and operations leaders must understand the implications of key factors such as time, cost, workload, business impact, capacity planning, staffing skills and tools.

Table Of Contents
  • Key Challenges



  • If Cost Is the Driving Factor, Ascertain Whether You Have Optimized Your Mainframe Environment
  • Determine the Time It Will Take to Migrate Completely Off the Mainframe
  • Recognize That Cost Savings Are Not Necessarily Commensurate With the Percentage of MIPS Offloaded
  • Ease of Migration Is More a Function of the Nature of the Workload and the Number of Applications Than It Is the Number of MIPS
  • Ascertain the Impact on Your Business Continuity/Disaster Recovery Plans
  • Plan for Historical Preservation of Data, Optionally Including Access to Content in the Absence of Original Applications
  • Premigration Capacity Planning Is Critical
  • Assess Your Staffing Skills
  • Know That Tools to Manage and Virtualize on Other Platforms May Not Be as Sophisticated as Those on the Mainframe
  • Identify Who Has to Pay All the Infrastructure Bills
  • Perform Your Financial Analysis Without an Emotional Bias
  • Determine What Modernization Means to the Business

Gartner Recommended Reading

©2020 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. and its affiliates. This publication may not be reproduced or distributed in any form without Gartner’s prior written permission. It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact. While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such. Your access and use of this publication are governed by Gartner’s Usage Policy. Gartner prides itself on its reputation for independence and objectivity. Its research is produced independently by its research organization without input or influence from any third party. For further information, see Guiding Principles on Independence and Objectivity.

Already have a Gartner Account?

Purchase this Document

To purchase this document, you will need to register or sign in above

Become a client

Learn how to access this content as a Gartner client.