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GQM, GQM+

GQM, GQM+. Supannika Koolmanojwong CSCI577 Spring 2013. Project Tracking. Goal-Question-Metric Goal-Question-Metric +. GQM paradigm. http://thecriticalpath.info/tag/gqm/. Goal-Question-Metric: What?. Promoted By Victor Basili , University of Maryland Software metric approach

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GQM, GQM+

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  1. GQM, GQM+ Supannika Koolmanojwong CSCI577 Spring 2013 (C) USC-CSSE

  2. Project Tracking • Goal-Question-Metric • Goal-Question-Metric + (C) USC-CSSE

  3. GQM paradigm (C) USC-CSSE http://thecriticalpath.info/tag/gqm/

  4. Goal-Question-Metric: What? • Promoted By Victor Basili, University of Maryland Software metric approach • Capturesmeasurement on three levels • Conceptual level (goal) • Defined for an object • Operational level (question) • Define models of the object of study • Quantitative level (metric) • Metrics associated with each question in a measurable way (C) USC-CSSE

  5. Goal-Question-Metric: Why? • Used within context of software quality improvement • Effective for the following purposes: • Understanding organization’s software practices • Guiding and monitoring software processes • Assessing new software engineering technologies • Evaluating improvement activities (C) USC-CSSE

  6. Goal-Question-Metric: How? • Six-step process • Develop a set of corporate, division, and project business goals • Generate questions defining those goals • Specify measures needed to be collected to answer questions • Develop mechanisms for data collection • Collect, validate,and analyze data. Provide feedback in real-time • Analyze data in post mortem fashion. Provide recommendations for future improvements. (C) USC-CSSE

  7. To create Goal • Build a sentence addressing each topic • “…object, purpose, quality attribute, perspective/viewpoint, environment …” • “ Analyzethe unit test process to understand the impact of adding additional tests to project A from the viewpoint of the project manager.” • Object – unit test process • Purpose – understand • Focus – impact of adding additional tests • View point - project manager • Environment – Project A (C) USC-CSSE http://sqgne.org/presentations/2007-08/Dow-Nov-2007.pdf

  8. (C) USC-CSSE http://sqgne.org/presentations/2007-08/Dow-Nov-2007.pdf

  9. (C) USC-CSSE http://sqgne.org/presentations/2007-08/Dow-Nov-2007.pdf

  10. GQM example (C) USC-CSSE http://thecriticalpath.info/tag/gqm/

  11. GQM Example (C) USC-CSSE http://www.goldpractices.com/practices/gqm/

  12. GQM ExampleAT&T developers was evaluating effectiveness of software inspections. • The main task was cost-benefits analysis of the inspections. (amount of effort expended per thousands of lines of code reviewed) (C) USC-CSSE

  13. (C) USC-CSSE

  14. GQM Example • TASK: Software-development process managementPROBLEM: During the software testing phase many anomalies were discovered and it is suspected that the software quality would not reach a satisfactory level by the shipping deadline. QUESTION: Construct a GQM tree that helps you to decide when it would be possible to ship the software. (C) USC-CSSE

  15. When it would be possible to ship the software? (C) USC-CSSE

  16. (C) USC-CSSE

  17. GQM – example : Office Space (C) USC-CSSE http://www.cura.org.uk/fig88gqmetric.pdf

  18. GQM+Strategies: What? • An extension of GQM • Built on top • Link software measurement goals to higher-level goals • Software organization • Entire business (C) USC-CSSE

  19. GQM+Strategies: Example • Wants: Increase customer satisfaction • Strategy: Improve product reliability • Both hardware and software • Software development contribution • Reduce defect slippage • Improve testing process • Team leaders decide on set of actions to take • Implement improvements • Measure results of improvements • A tie between test defect data and customer satisfaction (C) USC-CSSE

  20. GQM+Strategies: Example (C) USC-CSSE

  21. Workshop • Find a pair, do not pair with your own team members • 25 minutes to develop questions and metrics from the given goals. • Prepare to present your result. (C) USC-CSSE

  22. References • Goal-Question-Metric • http://en.wikipedia.org/wiki/GQM • http://www.cs.umd.edu/~mvz/handouts/gqm.pdf • http://goldpractice.thedacs.com/practices/gqm/ • GQM+Strategies • http://www.cs.umd.edu/~basili/publications/proceedings/P122.pdf • http://www-ivs.cs.uni-magdeburg.de/sw-eng/us/java/GQM/link3.shtml (C) USC-CSSE

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