Requirement Specification Statement

A Requirement Specification Statement is an atomic formal Requirement Specification that expresses a single requirement with specific conditions and measurable criteria.

• AKA: Individual Requirement, Atomic Requirement, Requirement Statement, Single Requirement Specification, Requirement Item.
• Context:
  • It can typically express Requirement Intent through shall statements and must statements.
  • It can typically define Requirement Conditions through preconditions and postconditions.
  • It can typically establish Requirement Criteria through acceptance thresholds and performance metrics.
  • It can typically ensure Requirement Clarity through unambiguous languages and precise terminologys.
  • It can typically enable Requirement Testability through verifiable conditions and measurable outcomes.
  • It can typically support Requirement Traceability through unique identifiers and reference links.
  • It can typically maintain Requirement Atomicity through single-concept focuses and indivisible statements.
  • ...
  • It can often include Requirement Priority through importance levels and urgency indicators.
  • It can often specify Requirement Source through stakeholder references and origin documentations.
  • It can often define Requirement Type through functional classifications and quality attributes.
  • It can often establish Requirement Dependency through prerequisite references and related requirements.
  • It can often contain Requirement Rationale through justification texts and business reasons.
  • ...
  • It can range from being a Simple Requirement Specification Statement to being a Complex Requirement Specification Statement, depending on its requirement statement complexity.
  • It can range from being a Functional Requirement Specification Statement to being a Non-Functional Requirement Specification Statement, depending on its requirement statement type.
  • It can range from being a Mandatory Requirement Specification Statement to being a Optional Requirement Specification Statement, depending on its requirement statement priority.
  • It can range from being a User Requirement Specification Statement to being a System Requirement Specification Statement, depending on its requirement statement level.
  • It can range from being a Natural Language Requirement Specification Statement to being a Formal Language Requirement Specification Statement, depending on its requirement statement notation.
  • ...
  • It can be part of Requirement Specification Documents through requirement sections and requirement lists.
  • It can connect to Test Cases through verification mappings and validation procedures.
  • It can interface with Design Elements through implementation mappings and solution traceabilitys.
  • It can communicate with Change Requests through modification trackings and impact analysises.
  • It can synchronize with Requirement Management Tools through database entrys and attribute trackings.
  • ...
• Example(s):
  • Functional Requirement Specification Statements defining system behaviors, such as:
    • User Authentication Requirement Specification Statement: "The system shall authenticate users using two-factor authentication within 3 seconds."
    • Data Processing Requirement Specification Statement: "The system shall process incoming transactions at a rate of 1000 per second."
    • User Interface Requirement Specification Statement: "The system shall display error messages in red text for 5 seconds."
  • Performance Requirement Specification Statements establishing quality metrics, such as:
    • Response Time Requirement Specification Statement: "The system shall respond to user queries within 200 milliseconds."
    • Throughput Requirement Specification Statement: "The system shall handle 10,000 concurrent users."
    • Availability Requirement Specification Statement: "The system shall maintain 99.9% uptime."
  • Security Requirement Specification Statements defining protection measures, such as:
    • Encryption Requirement Specification Statement: "The system shall encrypt all data at rest using AES-256."
    • Access Control Requirement Specification Statement: "The system shall enforce role-based access control."
    • Audit Requirement Specification Statement: "The system shall log all administrative actions."
  • Constraint Requirement Specification Statements imposing design limitations, such as:
    • Platform Requirement Specification Statement: "The system shall run on Linux Ubuntu 20.04 or later."
    • Integration Requirement Specification Statement: "The system shall integrate with SAP ERP via REST API."
    • Compliance Requirement Specification Statement: "The system shall comply with GDPR regulations."
  • ...
• Counter-Example(s):
  • Requirement Specification Documents, which are document collections rather than individual statements.
  • User Storys, which are narrative descriptions rather than formal requirement statements.
  • Design Decisions, which specify solution choices rather than requirement conditions.
  • Implementation Details, which describe how to build rather than what to build.
• See: Requirement Specification, Requirement Specification Document, Functional Requirement, Non-Functional Requirement, Requirement Attribute, Requirement Template, Requirement Pattern.

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