1. Copyright 2006 Scott W. Ambler Data Quality Survey Results Scott W. Ambler www.ambysoft.com/scottAmbler.html

2. Copyright 2006 Scott W. Ambler How To Use These Slides I have provided these slides, and the raw data behind them, so that others can use them in their own work. You may reuse all, or a part of, this slide deck as long as you provide a clear reference to the source. The suggested reference is: Results from Scott Ambler’s September 2006 Data Quality Survey posted at www.agilemodeling.com/surveys/www.agilemodeling.com/surveys/

3. Copyright 2006 Scott W. Ambler The Survey Sent out to ~28,000 people 1137 Respondents September 2006 >98% from North America Used Dr. Dobb’s Journal (DDJ) mailing list Results: –February 2007 issue of DDJ for summary article –Source data is downloadable www.ambysoft.com/surveys/

4. Copyright 2006 Scott W. Ambler Use of Color in These Slides Green is used for positive practices or results Yellow and orange are used for questionable practices or results (orange is worse than yellow) Red is used for problematic practices or results Muted colors, particularly purples and blues, are used for other practices or results Many traditional “best practices” are often rated as questionable

5. Copyright 2006 Scott W. Ambler Who Responded (By Role)

6. Copyright 2006 Scott W. Ambler Years of IT Experience

7. Copyright 2006 Scott W. Ambler Size of the IT Organization

8. Copyright 2006 Scott W. Ambler Which Sector Do You Work In?

9. Copyright 2006 Scott W. Ambler Data Quality Current State of Data Quality Org Size and Data Quality Strategies to Address Problems Service Level Agreement (SLA) in Place? SLA and Data Quality Data Naming Conventions Naming Conventions and Data Quality

10. Copyright 2006 Scott W. Ambler Current State of Data Quality

11. Copyright 2006 Scott W. Ambler Current State of Data Quality (% Respondents) by IT Organization Size

12. Copyright 2006 Scott W. Ambler Plans to Address Data Quality Problems

13. Copyright 2006 Scott W. Ambler Do You Have a Database Service Level Agreement (SLA) for Performance Defined?

14. Copyright 2006 Scott W. Ambler Do You Have a Database Service Level Agreement (SLA) for Availability Defined?

15. Copyright 2006 Scott W. Ambler Current State of Data Quality When Some Sort of Database SLA is Defined

16. Copyright 2006 Scott W. Ambler Approach to Data Naming Conventions

17. Copyright 2006 Scott W. Ambler Data Naming Conventions and Data Quality

18. Copyright 2006 Scott W. Ambler Ability to Actually Address Database Design Problems Time to Rename a Column Renaming a Column by Org Size

19. Copyright 2006 Scott W. Ambler Time to Safely Rename a Production Column

20. Copyright 2006 Scott W. Ambler Length of Time to Rename Production Column (% Respondents) by IT Organization Size

21. Copyright 2006 Scott W. Ambler Time to Safely Rename a Production Column When Database SLA in Place

22. Copyright 2006 Scott W. Ambler Database Refactoring Capability and Data Quality

23. Copyright 2006 Scott W. Ambler Database Testing Do You Test Your DB? When are You Testing? Types of Testing

24. Copyright 2006 Scott W. Ambler Do You Do Database Testing?

25. Copyright 2006 Scott W. Ambler When Are You Testing the Database? (%)

26. Copyright 2006 Scott W. Ambler Types of Database Testing (% Respondents)

27. Copyright 2006 Scott W. Ambler Database Testing and Data Quality

28. Copyright 2006 Scott W. Ambler Data Modeling When Do You Data Model on App Dev Projects? Types of Structural Modeling on App Dev Projects When Do You Data Model on Data Warehouse Projects? Types of Structural Modeling on Data Warehouse Projects Business Glossaries Enterprise Data Modeling

29. Copyright 2006 Scott W. Ambler When Do You Data Model on Application Development Projects?

30. Copyright 2006 Scott W. Ambler Data Quality and Data Modeling: None vs. Serial vs. Evolutionary

31. Copyright 2006 Scott W. Ambler What Types of Structural Modeling Do You Do on Application Development Projects?

32. Copyright 2006 Scott W. Ambler When Do You Data Model on a Data Warehousing Project?

33. Copyright 2006 Scott W. Ambler What Types of Structural Modeling Do You Do on Data Warehouse Projects?

34. Copyright 2006 Scott W. Ambler Business Glossaries

35. Copyright 2006 Scott W. Ambler Enterprise Data Modeling

36. Copyright 2006 Scott W. Ambler Suggested Resources The Agile Modeling Site –www.agilemodeling.comwww.agilemodeling.com The Agile Data Site –www.agiledata.orgwww.agiledata.org Refactoring Databases –www.ambysoft.com/books/refactoringDatabases.htmlwww.ambysoft.com/books/refactoringDatabases.html Agile Database Techniques –www.ambysoft.com/books/agileDatabaseTechniques.htmlwww.ambysoft.com/books/agileDatabaseTechniques.html