Metrics Used In Testing 軟件測試
Metrics Used In Testing
In this tutorial you will learn about metrics used in testing, The Product Quality Measures - 1. Customer satisfaction index, 2. Delivered defect quantities, 3. Responsiveness (turnaround time) to users, 4. Product volatility, 5. Defect ratios, 6. Defect removal efficiency, 7. Complexity of delivered product, 8. Test coverage, 9. Cost of defects, 10. Costs of quality activities, 11. Re-work, 12. Reliability and Metrics for Evaluating Application System Testing.
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The Product Quality Measures:
1. Customer satisfaction index
This index is surveyed before product delivery and after product delivery
(and on-going on a periodic basis, using standard questionnaires).The following are analyzed:
•Number of system enhancement requests per year
•Number of maintenance fix requests per year
•User friendliness: call volume to customer service hotline
•User friendliness: training time per new user
•Number of product recalls or fix releases (software vendors)
•Number of production re-runs (in-house information systems groups)
2. Delivered defect quantities
They are normalized per function point (or per LOC) at product delivery (first 3 months or first year of operation) or Ongoing (per year of operation) by level of severity, by category or cause, e.g.: requirements defect, design defect, code defect, documentation/on-line help defect, defect introduced by fixes, etc.
3. Responsiveness (turnaround time) to users
•Turnaround time for defect fixes, by level of severity
•Time for minor vs. major enhancements; actual vs. planned elapsed time
4. Product volatility
•Ratio of maintenance fixes (to repair the system & bring it into compliance with specifications ), vs. enhancement requests (requests by users to enhance or change functionality)
5. Defect ratios
•Defects found after product delivery per function point.
•Defects found after product delivery per LOC
•Pre-delivery defects: annual post-delivery defects
•Defects per function point of the system modifications
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