Podcast
Questions and Answers
What is the foundation from which software quality is measured?
What is the foundation from which software quality is measured?
What is likely to result if specified development criteria are not followed in software engineering?
What is likely to result if specified development criteria are not followed in software engineering?
Which type of requirements often goes unmentioned but are crucial for software quality?
Which type of requirements often goes unmentioned but are crucial for software quality?
Which characteristics refer to properties or elements defining the nature of a product?
Which characteristics refer to properties or elements defining the nature of a product?
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Which approach is known as the disciplined approach to achieving software quality?
Which approach is known as the disciplined approach to achieving software quality?
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What does lack of conformance to software requirements indicate in terms of quality?
What does lack of conformance to software requirements indicate in terms of quality?
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Which of the following is NOT a functional requirement for software quality?
Which of the following is NOT a functional requirement for software quality?
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Which quality metric relates to the ability to recover from system failures or destruction?
Which quality metric relates to the ability to recover from system failures or destruction?
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Which of the following is NOT an implicit characteristic of software quality mentioned in the text?
Which of the following is NOT an implicit characteristic of software quality mentioned in the text?
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Which quality metric refers to the degree to which a program can be understood without difficulty?
Which quality metric refers to the degree to which a program can be understood without difficulty?
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Which of the following is NOT a development standard mentioned in the text?
Which of the following is NOT a development standard mentioned in the text?
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Which quality metric refers to the ability to trace program components back to requirements?
Which quality metric refers to the ability to trace program components back to requirements?
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Which of the following is NOT one of the quality factors for product operations according to McCall?
Which of the following is NOT one of the quality factors for product operations according to McCall?
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What does the quality metric 'auditability' refer to?
What does the quality metric 'auditability' refer to?
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Which of the following statements about 'accuracy' as a quality metric is NOT true?
Which of the following statements about 'accuracy' as a quality metric is NOT true?
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What does the quality metric 'completeness' ensure?
What does the quality metric 'completeness' ensure?
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Which of the following is NOT a quality metric mentioned in the provided information?
Which of the following is NOT a quality metric mentioned in the provided information?
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What does the quality metric 'consistency' refer to?
What does the quality metric 'consistency' refer to?
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Study Notes
Software Quality
- Software quality is measured by conforming to requirements; lack of conformance is lack of quality.
- Specified standards define development criteria; if not followed, lack of quality will result.
- There are implicit requirements (e.g., maintainability) that must be met.
Quality Characteristics
- These are properties or elements that define the nature of a product.
- Characteristics can be physical or chemical properties (e.g., size, weight, color).
Software Quality Factors (by McCall)
- Product Operations:
- Correctness
- Reliability
- Efficiency
- Integrity
- Usability
Quality Metrics
- These provide an indication of how closely software conforms to implicit and explicit requirements.
- Auditability: ease of checking conformance to standards.
- Accuracy: precision of computations and control, freedom from error.
- Communication commonality: use of standards, interfaces, protocols, and bandwidths.
- Completeness: implementation of required functions.
- Conciseness: compactness of the program in terms of lines of code.
- Consistency: use of uniform design and documentation techniques.
- Operability: ease of operation of a program.
- Robustness: ability to operate correctly despite invalid inputs.
- Security: mechanisms to control or protect programs and data.
- Self-documentation: meaningful documentation in the source code.
- Simplicity: ease of understanding the program.
- Software system independence: independence from nonstandard programming language features, operating system characteristics, and environmental constraints.
- Traceability: ability to trace a design representation or actual program component back to requirements.
- Training: degree to which software enables new users to apply the system.
Laws of Software Evolution Dynamics
- Law of continuing Change: software is constantly changing.
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Description
Learn about three important points to remember on software quality, including the significance of software requirements as the foundation of quality measurement. Explore the concepts of striving for excellence through continuous improvement and statistical analysis of failure causes.
