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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

Software Metrics

HNC Computing

Unit 8 Quality Management

Sue Hargrave

slide2
Control Metrics
  • Predictor Metrics
possible relationships between internal and external software attributes
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

conditions
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
data collection
Data collection
  • Static product analysis
  • Dynamic product analysis
  • Process data collation
automated data collection
Automated Data Collection

Instrumented software

system

Fault

Data

Usage

Data

data collection1
Data collection
  • Decide what questions need to be answered
  • Inform development staff of purpose of data collection
  • Manual collection of data during process development