List of system quality attributes

Within systems engineering, quality attributes are realized non-functional requirements used to evaluate the performance of a system. These are sometimes named architecture characteristics, or "ilities" after the suffix many of the words share. They are usually architecturally significant requirements that require architects' attention.^[1]

Quality attributes

Notable quality attributes include:

• accessibility
• accountability
• accuracy
• adaptability
• administrability
• affordability
• agility (see Common subsets below)
• auditability
• autonomy
• availability
• compatibility
• composability
• confidentiality
• configurability
• correctness
• credibility
• customizability
• debuggability
• degradability
• determinability
• demonstrability
• dependability (see Common subsets below)
• deployability
• discoverability
• distributability
• durability
• effectiveness
• efficiency
• evolvability
• extensibility
• failure transparency
• fault-tolerance
• fidelity
• flexibility
• inspectability
• installability
• integrity
• interchangeability
• interoperability
• learnability
• localizability
• maintainability
• manageability
• mobility
• modifiability
• modularity
• observability
• operability
• orthogonality
• portability
• precision
• predictability
• process capabilities
• producibility
• provability
• recoverability
• redundancy
• relevance
• reliability
• repeatability
• reproducibility
• resilience
• responsiveness
• reusability
• robustness
• safety
• scalability
• seamlessness
• self-sustainability
• serviceability (a.k.a. supportability)
• securability (see Common subsets below)
• simplicity
• stability
• standards compliance
• survivability
• sustainability
• tailorability
• testability
• timeliness
• traceability
• transparency
• ubiquity
• understandability
• upgradability
• usability
• vulnerability

Many of these quality attributes can also be applied to data quality.

Common subsets

• Together, reliability, availability, serviceability, usability and installability, are referred to as RASUI.
• Functionality, usability, reliability, performance and supportability are together referred to as FURPS in relation to software requirements.
• Agility in working software is an aggregation of seven architecturally sensitive attributes: debuggability, extensibility, portability, scalability, securability, testability and understandability.
• For databases reliability, availability, scalability and recoverability (RASR), is an important concept.
• Atomicity, consistency, isolation (sometimes integrity), durability (ACID) is a transaction metric.
• When dealing with safety-critical systems, the acronym reliability, availability, maintainability and safety (RAMS) is frequently used.^{[citation needed]}
• Dependability is an aggregate of availability, reliability, safety, integrity and maintainability.
  • Integrity depends on security and survivability.
  • Security is a composite of confidentiality, integrity and availability. Security and dependability are often treated together.

See also

• Non-functional requirement
• Information quality
• ISO/IEC 9126 Software engineering—product quality
• Cognitive dimensions of notations
• Software quality

References

Further reading

• Erl, Thomas (2007). SOA: Principles of Service Design. Prentice Hall. ISBN 9780132344821. https://books.google.com/books?id=mkQJvjR2sX0C. 
• Gitzel, R.; Korthausa, A.; Schadera, M. (30 April 2007). "Using established Web Engineering knowledge in model-driven approaches". Science of Computer Programming 66 (2): 105–124. doi:10.1016/j.scico.2006.09.001. 
• Bass, Len; Clements, Paul C.; Kazman, Rick (2012). Software Architecture in Practice (3rd ed.). ISBN 9780321815736. https://books.google.com/books?id=-II73rBDXCYC. 

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