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2. Software design description - Wikipedia

   en.wikipedia.org/wiki/Software_Design_Description

   A software design description (a.k.a. software design document or SDD; just design document; also Software Design Specification) is a representation of a software design that is to be used for recording design information, addressing various design concerns, and communicating that information to the design’s stakeholders.

3. Requirements engineering - Wikipedia

   en.wikipedia.org/wiki/Requirements_engineering

   Requirements engineering (RE) [1] is the process of defining, documenting, and maintaining requirements [2] in the engineering design process. It is a common role in systems engineering and software engineering .

4. Software design - Wikipedia

   en.wikipedia.org/wiki/Software_design

   One component of software design is software requirements analysis (SRA). SRA is a part of the software development process that lists specifications used in software engineering. The output of the analysis is smaller problems to solve. In contrast, the design focuses on capabilities, and thus multiple designs for the same problem can exist.

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. Formal methods - Wikipedia

   en.wikipedia.org/wiki/Formal_methods

   Formal verification is the use of software tools to prove properties of a formal specification, or to prove that a formal model of a system implementation satisfies its specification. Once a formal specification has been developed, the specification may be used as the basis for proving properties of the specification, and by inference ...

7. Functional specification - Wikipedia

   en.wikipedia.org/wiki/Functional_specification

   A functional specification (also, functional spec, specs, functional specifications document (FSD), functional requirements specification) in systems engineering and software development is a document that specifies the functions that a system or component must perform (often part of a requirements specification) (ISO/IEC/IEEE 24765-2010).