The presentation I gave at the ICSE 2009 doctoral consortium. Squeezing 3 years of work in a 10 minutes presentation is definitely a valuable exercise.

1. Visual Exploration
of Large-Scale Evolving Software
Richard Wettel
University of Lugano, Switzerland
Supervisor: Michele Lanza

2. understanding software is
expensive

3. software systems are

4. software systems are
large

5. software systems are
large
complex

6. software systems are
large
complex
ev l g
o vin

7. “Software is intangible,
having no physical
shape or size”.
[Ball & Eick, IEEE Computer 1996]

8. seeing
is understanding

9. Visualization makes software
more tangible, using metaphors.

10. Visualization makes software
more tangible, using metaphors.

11. research hypothesis
The use of a city
metaphor helps building a
consistent mental model
of software systems.

12. the city metaphor
Richard Wettel, Michele Lanza. Visualizing Software Systems as Cities.
In Proc. of VISSOFT 2007 (4th IEEE International Workshop on Visualizing Software for Understanding and Analysis), pp. 92 - 99, IEEE CS Press, 2007.

13. the city metaphor
class building
package district
Richard Wettel, Michele Lanza. Visualizing Software Systems as Cities.
In Proc. of VISSOFT 2007 (4th IEEE International Workshop on Visualizing Software for Understanding and Analysis), pp. 92 - 99, IEEE CS Press, 2007.

14. the city metaphor
class building
package district
Richard Wettel, Michele Lanza. Visualizing Software Systems as Cities.
In Proc. of VISSOFT 2007 (4th IEEE International Workshop on Visualizing Software for Understanding and Analysis), pp. 92 - 99, IEEE CS Press, 2007.

15. the city metaphor
number of methods (NOM) height
number of attributes (NOA) base size
class building
package district
Richard Wettel, Michele Lanza. Visualizing Software Systems as Cities.
In Proc. of VISSOFT 2007 (4th IEEE International Workshop on Visualizing Software for Understanding and Analysis), pp. 92 - 99, IEEE CS Press, 2007.

16. the city metaphor
number of methods (NOM) height
number of attributes (NOA) base size
class building
package district
nesting level color
Richard Wettel, Michele Lanza. Visualizing Software Systems as Cities.
In Proc. of VISSOFT 2007 (4th IEEE International Workshop on Visualizing Software for Understanding and Analysis), pp. 92 - 99, IEEE CS Press, 2007.

17. ArgoUML
~2‘500 classes
~150 packages

18. Application 1: program comprehension
ArgoUML
~2‘500 classes
~150 packages
Richard Wettel, Michele Lanza. Program Comprehension through Software Habitability.
In Proceedings of ICPC 2007 (15th IEEE International Conference on Program Comprehension), pp. 231 - 240, IEEE Computer Society, 2007.

19. Application 1: program comprehension
massive buildings
ArgoUML
~2‘500 classes
~150 packages
Richard Wettel, Michele Lanza. Program Comprehension through Software Habitability.
In Proceedings of ICPC 2007 (15th IEEE International Conference on Program Comprehension), pp. 231 - 240, IEEE Computer Society, 2007.

20. Application 1: program comprehension
skyscrapers
massive buildings
ArgoUML
~2‘500 classes
~150 packages
Richard Wettel, Michele Lanza. Program Comprehension through Software Habitability.
In Proceedings of ICPC 2007 (15th IEEE International Conference on Program Comprehension), pp. 231 - 240, IEEE Computer Society, 2007.

21. Application 1: program comprehension
skyscrapers
massive buildings
ArgoUML
~2‘500 classes
~150 packages
parking lots
Richard Wettel, Michele Lanza. Program Comprehension through Software Habitability.
In Proceedings of ICPC 2007 (15th IEEE International Conference on Program Comprehension), pp. 231 - 240, IEEE Computer Society, 2007.

22. Application 1: program comprehension
skyscrapers
massive buildings
ArgoUML
~2‘500 classes
houses ~150 packages
parking lots
Richard Wettel, Michele Lanza. Program Comprehension through Software Habitability.
In Proceedings of ICPC 2007 (15th IEEE International Conference on Program Comprehension), pp. 231 - 240, IEEE Computer Society, 2007.

23. case studies

24. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

25. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

26. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

27. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

28. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

29. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

30. case studies
System Language NOP NOC kLOC
ArgoUML Java 141 2‘442 143
Azureus Java 457 4’734 274
iText Java 149 1’250 80
Jmol Java 105 1’032 85
JDK 1.5 Java 137 4’715 160
Moose Smalltalk 278 994 35
ScumVM C++ 17 1’331 80

31. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

32. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

33. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

34. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

35. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

36. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

37. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

38. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

39. Application 2: evolution analysis
ArgoUML
8 major releases
~5 years
0.10.1 0.12 0.14 0.16 0.18.1 0.20 0.22 0.24
2002 2003 2004 2005 2006 2007
Richard Wettel, Michele Lanza. Visual Exploration of Large-Scale System Evolution.
In Proceedings of WCRE 2008 (15th Working Conference on Reverse Engineering), pp. 219 - 228, IEEE Computer Society, 2008.

40. Application 3: design assessment
ArgoUML
Richard Wettel, Michele Lanza. Visually Localizing Design Problems with Disharmony Maps.
In Proceedings of Softvis 2008 (4th ACM International Symposium on Software Visualization), pp. 155 - 164, ACM Press, 2008.

41. Application 3: design assessment
ArgoUML
Brain classes 8
God classes 30
Brain & God classes 6
Data classes 17
Richard Wettel, Michele Lanza. Visually Localizing Design Problems with Disharmony Maps.
In Proceedings of Softvis 2008 (4th ACM International Symposium on Software Visualization), pp. 155 - 164, ACM Press, 2008.

42. tool support
Richard Wettel, Michele Lanza. CodeCity: 3D Visualization of Large-Scale Software.
In companion Proceedings of ICSE 2008 (30th International Conference on Software Engineering), Research Demonstration Track, pp. 921 - 922, ACM Press, 2008.
Richard Wettel, Michele Lanza. CodeCity.
In Proceedings of WASDeTT 2008 (1st International Workshop on Advanced Software Development Tools and Techniques), 2008.

43. tool support
Richard Wettel, Michele Lanza. CodeCity: 3D Visualization of Large-Scale Software.
In companion Proceedings of ICSE 2008 (30th International Conference on Software Engineering), Research Demonstration Track, pp. 921 - 922, ACM Press, 2008.
Richard Wettel, Michele Lanza. CodeCity.
In Proceedings of WASDeTT 2008 (1st International Workshop on Advanced Software Development Tools and Techniques), 2008.
Richard Wettel. Scripting 3D Visualizations with CodeCity
In Proceedings of FAMOOSr 2008 (2nd Workshop on FAMIX and Moose in Reengineering), 2008.

44. tool support
http://www.inf.unisi.ch/phd/wettel/ codecity.html
Richard Wettel, Michele Lanza. CodeCity: 3D Visualization of Large-Scale Software.
In companion Proceedings of ICSE 2008 (30th International Conference on Software Engineering), Research Demonstration Track, pp. 921 - 922, ACM Press, 2008.
Richard Wettel, Michele Lanza. CodeCity.
In Proceedings of WASDeTT 2008 (1st International Workshop on Advanced Software Development Tools and Techniques), 2008.
Richard Wettel. Scripting 3D Visualizations with CodeCity
In Proceedings of FAMOOSr 2008 (2nd Workshop on FAMIX and Moose in Reengineering), 2008.

45. current status

46. current status

47. current status

48. current status
Prof. Michele Lanza
advisor
Prof. Matthias Hauswirth
internal member
Prof. Cesare Pautasso
internal member
Prof. André van der Hoek
external member
Prof. Rainer Koschke
external member

49. current status
Prof. Michele Lanza
advisor
Prof. Matthias Hauswirth
internal member
Prof. Cesare Pautasso
internal member
Prof. André van der Hoek
external member
Prof. Rainer Koschke
external member

50. current status: 10 months to go
Prof. Michele Lanza
advisor
Prof. Matthias Hauswirth
internal member
Prof. Cesare Pautasso
internal member
Prof. André van der Hoek
external member
Prof. Rainer Koschke
external member

51. contributions remaining work

52. contributions remaining work
city metaphor
1
VISSOFT 2007

53. contributions remaining work
city metaphor
1
VISSOFT 2007
applications
2

54. contributions remaining work
city metaphor
1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007

55. contributions remaining work
city metaphor
1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008

56. contributions remaining work
city metaphor
1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008

57. contributions remaining work
city metaphor
1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

58. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

59. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

60. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications
2 ‣program comprehension ICPC 2007
‣evolution analysis
‣design assessment
SoftVis 2008
WCRE 2008
2 experimental
validation
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

61. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications 2 validation
experimental
2 ‣program comprehension ICPC 2007
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

62. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications 2 validation
experimental
2 ‣program comprehension ICPC 2007 Oct.2009
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008
tool
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

63. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications 2 validation
experimental
2 ‣program comprehension ICPC 2007 Oct.2009
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008 writing
tool Mar.2010
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008

64. contributions remaining work
city metaphor relationships
1 1
VISSOFT 2007
applications 2 validation
experimental
2 ‣program comprehension ICPC 2007 Oct.2009
‣evolution analysis SoftVis 2008
‣design assessment WCRE 2008 writing
tool Mar.2010
3
ICSE 2008 (demo)
WASDeTT 2008
FAMOOSr 2008
Apr. 2010 defense

65. Richard Wettel
http://www.inf.unisi.ch/phd/wettel
http://creativecommons.org/licenses/by/3.0/