Requirement Specification

A Requirement Specification is a formal specification that defines system requirements through requirement statements or requirement documents.

• AKA: Requirement Definition, Requirement Description, Requirement Formalization.
• Context:
  • It can typically express Requirement Intent through formal requirement languages and structured requirement formats.
  • It can typically capture Stakeholder Needs through requirement elicitations and requirement analysises.
  • It can typically establish Requirement Scope through requirement boundarys and requirement constraints.
  • It can typically ensure Requirement Quality through requirement validations and requirement verifications.
  • It can typically support Requirement Communication through standardized requirement notations and requirement visualizations.
  • It can typically enable Requirement Management through requirement trackings and requirement change controls.
  • ...
  • It can often facilitate System Development through implementable requirements and testable requirements.
  • It can often guide Design Decisions through requirement prioritys and requirement dependencys.
  • It can often support Project Planning through requirement estimations and requirement allocations.
  • It can often enable Compliance Demonstration through traceable requirements and auditable requirements.
  • ...
  • It can range from being a Single Requirement Specification to being a Complete Requirement Specification, depending on its requirement specification granularity.
  • It can range from being a Atomic Requirement Specification to being a Composite Requirement Specification, depending on its requirement specification structure.
  • It can range from being a Informal Requirement Specification to being a Formal Requirement Specification, depending on its requirement specification rigor.
  • It can range from being a Natural Language Requirement Specification to being a Formal Language Requirement Specification, depending on its requirement specification notation.
  • ...
  • It can integrate with Requirement Engineering Processes for systematic requirement development.
  • It can connect to System Design Processes for requirement-driven design.
  • It can interface with Verification Processes for requirement verification planning.
  • It can communicate with Validation Processes for requirement validation execution.
  • ...
• Example(s):
  • Requirement Specification Statements expressing individual requirements, such as:
    • Functional Requirement Specification Statements defining single functions.
    • Performance Requirement Specification Statements establishing quality metrics.
    • Constraint Requirement Specification Statements imposing design limitations.
  • Requirement Specification Documents containing requirement collections, such as:
    • System Requirement Specification Documents for complete systems.
    • Software Requirement Specification Documents for software products.
    • Service Requirement Specification Documents for service offerings.
  • Requirement Specification Models representing requirement structures, such as:
    • Use Case Specifications capturing interaction requirements.
    • User Story Specifications expressing user requirements.
    • Feature Specifications defining capability requirements.
  • ...
• Counter-Example(s):
  • Implementation Code, which realizes requirements rather than specifying them.
  • Test Cases, which verify requirements rather than defining them.
  • Design Patterns, which provide solution templates rather than requirement statements.
• See: Requirement Specification Document, Requirement Specification Statement, Requirement Engineering, System Requirement, Functional Requirement, Non-Functional Requirement, Requirement Management.

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