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

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

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?

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

CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS The ft view Is at the right level Aggregates data and metrics Uses visual techniques Depends on the question

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

CERN GS Department CH-1211 Genève 23 Switzerland cern.ch/gs-dep Internet Services GS AIS Functional Requirements

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

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

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 (2*1) = 3.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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