1. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS General Services Department GS Administrative Information Services How to be aware of Software Quality David Gonzalez Maline May 15 th 2012

2. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS How do we measure SQ?

3. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS What is Software Quality? Functional Requirements: Is the software useful to the users? Non Functional Requirements: Is the design appropriate? Is it easy to understand/maintain?

4. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Find the right perspective

5. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS The 10.000ft view http://softarch.97things.oreilly.com/wiki/index.php/Get_the_1000ft_view Is at the right level Aggregates data and metrics Uses visual techniques Depends on the question

6. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Metrics Lines of Code Size of Method Size of Classes Duplication Different complexities

7. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Functional Requirements http://www.alfredodehoces.com/fuckowski-on-line

8. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Code Coverage

9. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Test/Code Ratio

10. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Cyclomatic Complexity A control flow graph of a simple program. The program begins executing at the red node, then enters a loop (group of three nodes immediately below the red node). On exiting the loop, there is a conditional statement (group below the loop), and finally the program exits at the blue node. For this graph, E = 9, N = 8 and P = 1, so the cyclomatic complexity of the program is 9 - 8 + (2*1) = 3.

11. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Toxicity Chart

12. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Dependency Structure Matrix

13. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Dependency Structure Matrix Pastafarian!

14. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Dependency Structure Matrix

15. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Dependency graphs

16. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Tree Maps

17. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS System Complexity View

18. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up

19. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up

20. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up

21. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up

22. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up

23. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Environment Set Up Introscope® Workstation

24. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS How do you see quality? Making comparisions Industry standards Trends Outliers Aesthetics Symmetry Balance/harmony

25. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Beware of this religion!

26. CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Спасибо! David.Gonzalez.Maline@cern.ch