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Software Metrics

Software Metrics. HNC Computing Unit 8 Quality Management Sue Hargrave. Control Metrics Predictor Metrics. Possible relationships between internal and external software attributes. Number of procedure parameters. Maintainability. Cyclomatic Complexity. Reliability. Program size in

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Software Metrics

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  1. Software Metrics HNC Computing Unit 8 Quality Management Sue Hargrave

  2. Control Metrics • Predictor Metrics

  3. Possible relationships between internal and external software attributes Number of procedure parameters Maintainability Cyclomatic Complexity Reliability Program size in lines of code Portability Number of error messages Usability Length of user manual

  4. Conditions • The internal attribute must be measured accurately • A relationship must exist between what we can measure and the external behavioural attribute • This relationship is understood, has been validated and can be expressed in terms of a formula or model

  5. Data collection • Static product analysis • Dynamic product analysis • Process data collation

  6. Automated Data Collection Instrumented software system Fault Data Usage Data

  7. Data collection • Decide what questions need to be answered • Inform development staff of purpose of data collection • Manual collection of data during process development

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