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The Archeology of Legacy Systems Patricia Ensworth SQE STAR East May 2002 pensworth@yahoo

The Archeology of Legacy Systems Patricia Ensworth SQE STAR East May 2002 pensworth@yahoo.com www.wiley.com/compbooks/ensworth. Agenda. Circumstances Goals Methods Work products Process issues. Circumstances. Loss of support Reorganization Disaster recovery. Goals. Bug fixes

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The Archeology of Legacy Systems Patricia Ensworth SQE STAR East May 2002 pensworth@yahoo

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  1. The Archeology of Legacy Systems Patricia Ensworth SQE STAR East May 2002 pensworth@yahoo.com www.wiley.com/compbooks/ensworth

  2. Agenda • Circumstances • Goals • Methods • Work products • Process issues

  3. Circumstances • Loss of support • Reorganization • Disaster recovery

  4. Goals • Bug fixes • Enhancements • Migration

  5. Methods - User interviews • User types • Functions • Workflow steps • Permissions • Locations

  6. Methods - User interviews • Scenarios • Typical • Extraordinary • Periodic

  7. Methods - User interviews • Data • Normal • Invalid • Boundary • Environment

  8. Methods - System analysis • User interface • Data feeds • Input forms • Windows • Web pages • Reports • Electronic output

  9. Methods - System analysis • Middle tier • Processes • Data objects • Workflow • Administration and security • Replication

  10. Methods - System analysis • Hardware • Data servers • File servers • Internet servers • Firewall

  11. Methods - System analysis • Environment • Operating system • Browser • Office tools • Custom applications

  12. Methods - System analysis • Database • Tables • Stored procedures • Triggers • Caches • Open servers

  13. Work products - Requirements documentation • Design requirements • Functionality • Performance • Security • Acceptance criteria

  14. Work products - Requirements documentation • Use cases • “Game show” • “Soap opera” • “Historical novel”

  15. Work products - System documentation • User interface • User type list • User interface component inventory • User interface elements inventory • Data elements specifications • Control elements specifications • Message list

  16. Work products - System documentation • Middle tier / hardware / environment • Data itinerary • Program rules list • Operations guides • Standards documents

  17. Work products - System documentation • Database • System architecture schema • Data dictionary • Procedure inventory • Data model • Data flow schema

  18. Process issues • Roles and responsibilities • Product manager • Project manager • User experts • Developers • Documentation maintenance • Repository • Resources

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