Gartner Research

Estimating the Future Cost of Application Maintenance

Published: 02 May 2011

ID: G00212527

Analyst(s): Andy Kyte


An application's development cost is just the down payment. Year after year, the application will require continuous maintenance, but how much budget provision should be made for this activity?

Table Of Contents
  • Overview


  • Introduction to Application Maintenance
  • Estimating the Maintenance Impact of Future Enhancements
  • Design for Maintainability
    • Analyzability
    • Testability
    • Change Controls
  • The Components of Estimating for Application Maintenance
    • Full-Time Equivalent Budget
    • Maintenance Investment Budget
  • Estimating Corrective Maintenance
  • Estimating Adaptive Maintenance
  • Estimating Preventive Maintenance
  • Estimating Perfective Maintenance
  • Estimating Minor Enhancements
  • Summary

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