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  1. Legacy System Challenges - Skills, Risk, and Replacement
    by Dr. Osama M. Khaled — published Aug 22, 2026 — filed under: Undergraduate, Professional
    COBOL and skill shortages, security vulnerabilities in old systems, and why replacing a working legacy system is expensive and risky
    Located in Computing / Software Engineering / Software Evolution
  2. Software Evolution - Use Case Scenarios
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:38 PM — filed under: Undergraduate, Professional
    Comprehensive, fresh-question review spanning the whole chapter, with original use-case scenarios combining multiple concepts (strategy selection, maintenance ...
    Located in Computing / Software Engineering / Software Evolution
  3. Software Evolution - Exercises
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:33 PM — filed under: Undergraduate, Professional
    Self-contained scenario questions on technology obsolescence, impact analysis, sociotechnical risk, reengineering strategy, support software risk, metrics ...
    Located in Computing / Software Engineering / Software Evolution
  4. Refactoring - Preventative Maintenance
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:29 PM — filed under: Undergraduate, Professional
    Refactoring as continuous structural upkeep, its tie to agile methods, common "bad smells," and how it differs from reengineering
    Located in Computing / Software Engineering / Software Evolution
  5. Software Reengineering - Process and Advantages
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Aug 23, 2026 09:50 PM — filed under: Undergraduate, Professional
    The five-stage reengineering process (translation, reverse engineering, restructuring, modularization, data reengineering), its cost/risk advantages over ...
    Located in Computing / Software Engineering / Software Evolution
  6. Maintenance Prediction
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:19 PM — filed under: Undergraduate, Professional
    Predicting future change volume, the complexity-maintainability link, and process metrics (impact analysis time, outstanding requests) used to spot declining ...
    Located in Computing / Software Engineering / Software Evolution
  7. Why Maintenance Costs More Than New Development
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:16 PM — filed under: Undergraduate, Professional
    The four reasons maintenance is pricier than original development, and how integrating development/maintenance roles can help
    Located in Computing / Software Engineering / Software Evolution
  8. Software Maintenance - Types and Cost Distribution
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:14 PM — filed under: Undergraduate, Professional
    The three maintenance types (fault repair, environmental adaptation, functionality addition), naming inconsistencies, and how effort is distributed across them
    Located in Computing / Software Engineering / Software Evolution
  9. Legacy System Assessment - Environment and Application Quality
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:12 PM — filed under: Undergraduate, Professional
    Technical assessment factors for hardware/support software (supplier stability, age, interoperability) and application software quality indicators
    Located in Computing / Software Engineering / Software Evolution
  10. Legacy System Assessment - Business Value and the Four Clusters
    by Dr. Osama M. Khaled — published Jun 24, 2026 — last modified Jun 24, 2026 09:09 PM — filed under: Undergraduate, Professional
    Plotting business value against system quality to form four decision clusters, and the four issues used to judge business value
    Located in Computing / Software Engineering / Software Evolution
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