software testing metrics types and examples

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software testing metrics: types and examples

software testing metrics are quantitative measures used to assess the quality and effectiveness of the testing process. they help in evaluating the progress of testing activities, the quality of the software being tested, and the efficiency of the testing process. below is a comprehensive tutorial on various types of software testing metrics, along with examples and code snippets where applicable.

1. defect density

**definition**: defect density is the number of confirmed defects divided by the size of the software entity (usually measured in lines of code).

**formula**:
\[ \text{defect density} = \frac{\text{number of defects}}{\text{lines of code}} \]

**example**:
2. test coverage

**definition**: test coverage measures the extent to which the source code of a program is tested by a particular test suite. it can be measured in terms of statements, branches, or functions covered.

**formula**:
\[ \text{test coverage} = \frac{\text{number of code elements tested}}{\text{total number of code elements}} \times 100 \]

**example**:
3. test execution metrics

**definition**: these metrics help track the execution of test cases over time. key metrics include the number of test cases executed, passed, failed, and blocked.

**example**:
4. mean time to detect (mttd)

**definition**: mean time to detect is the average time taken to discover defects in the software after it has been released.

**formula**:
\[ \text{mttd} = \frac{\text{total time to detect defects}}{\text{number of defects detected}} \]

**example**:
5. mean time to repair (mttr)

**definition**: mean time to repair is the average time taken to fix a defect once it has been detected.

**formula**:
\[ \text{mttr} = \frac{\text{total time to repair defects}}{\text{number of defects repaired}} \]

**example**:
6. test case pass rate

**definition**: test case pass rate indicates the percentage of test cases that have passed against the total numb ...

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software testing metrics
types of testing metrics
examples of testing metrics
defect density
test case pass rate
test coverage
test execution metrics
quality assurance metrics
performance testing metrics
defect discovery rate
test case effectiveness
requirement traceability metrics
automation testing metrics
test cycle time
user acceptance testing metrics

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