- Functionality - Capability (Size & Generality of Feature Set), Reusability (Compatibility, Interoperability, Portability), Security (Safety & Exploitability)
- Usability (UX) - Human Factors, Aesthetics, Consistency, Documentation, Responsiveness
- Reliability - Availability (Failure Frequency (Robustness/Durability/Resilience), Failure Extent & Time-Length (Recoverability/Survivability)), Predictability (Stability), Accuracy (Frequency/Severity of Error)
- Performance - Speed, Efficiency, Resource Consumption (power, ram, cache, etc), Throughput, Capacity, Scalability
- Supportability (Serviceability, Maintainability, Sustainability, Repair Speed) - Testability, Flexibility (Modifiability, Configurability, Adaptability, Extensibility, Modularity), Installability, Localizability
The model, developed at Hewlett-Packard, was first publicly elaborated by Grady and Caswell. FURPS+ is now widely used in the software industry. The + was later added to the model after various campaigns at HP to extend the acronym to emphasize various attributes.
- Watson, Mike (2006). Managing Smaller Projects: A Practical Approach. Multi-Media Publications Inc. pp. 117 ff. ISBN 978-1-895186-85-7.
- Kenett, Ron; Baker, Emanuel (1999). Software Process Quality: Management and Control. CRC Press. pp. 130 ff. ISBN 978-0-8247-1733-9.
- Grady, Robert; Caswell, Deborah (1987). Software Metrics: Establishing a Company-wide Program. Prentice Hall. p. 159. ISBN 0-13-821844-7.
- Grady, Robert (1992). Practical Software Metrics for Project Management and Process Improvement. Prentice Hall. p. 32. ISBN 0-13-821844-7.
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