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2. Non-functional requirement - Wikipedia

   en.wikipedia.org/wiki/Non-functional_requirement

   Broadly, functional requirements define what a system is supposed to do and non-functional requirements define how a system is supposed to be.Functional requirements are usually in the form of "system shall do <requirement>", an individual action or part of the system, perhaps explicitly in the sense of a mathematical function, a black box description input, output, process and control ...

3. Non-functional requirements framework - Wikipedia

   en.wikipedia.org/wiki/Non-Functional...

   Within the application boundary, non-functional requirements are associated with relevant categories and their sub-categories. Using a standardized set of basic criteria, each of the sub-categories is then sized according to its type and complexity; the size of such a requirement is the sum of the sizes of its sub-categories.

4. List of system quality attributes - Wikipedia

   en.wikipedia.org/wiki/List_of_system_quality...

   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]

5. Software requirements specification - Wikipedia

   en.wikipedia.org/wiki/Software_requirements...

   A software requirements specification (SRS) is a description of a software system to be developed.It is modeled after the business requirements specification.The software requirements specification lays out functional and non-functional requirements, and it may include a set of use cases that describe user interactions that the software must provide to the user for perfect interaction.

6. Software quality - Wikipedia

   en.wikipedia.org/wiki/Software_quality

   Software's functional quality reflects how well it complies with or conforms to a given design, based on functional requirements or specifications. [1] That attribute can also be described as the fitness for the purpose of a piece of software or how it compares to competitors in the marketplace as a worthwhile product. [2]

7. ISO/IEC 9126 - Wikipedia

   en.wikipedia.org/wiki/ISO/IEC_9126

   ISO/IEC 9126 distinguishes between a defect and a nonconformity, a defect being "The nonfulfilment of intended usage requirements", whereas a nonconformity is "The nonfulfilment of specified requirements". A similar distinction is made between validation and verification, known as V&V in the testing trade.

8. FURPS - Wikipedia

   en.wikipedia.org/wiki/FURPS

   FURPS is an acronym representing a model for classifying software quality attributes (functional and non-functional requirements): Functionality - Capability (Size & Generality of Feature Set), Reusability (Compatibility, Interoperability, Portability), Security (Safety & Exploitability)

9. Software quality control - Wikipedia

   en.wikipedia.org/wiki/Software_quality_control

   Software quality control refers to specified functional requirements as well as non-functional requirements such as supportability, performance and usability. [2] It also refers to the ability for software to perform well in unforeseeable scenarios and to keep a relatively low defect rate.