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Functional requirements are specifications of business needs such as business rules, process flows and calculations. In many cases, the term functional requirements is used to denote all requirements that are considered business driven including behavioral specifications. Non-functional requirements capture anything not in the functional requirements including things such as operational characteristics, architecture, technical specifications and design.
Differs By IndustryThe line between functional and non-functional requirements varies by industry and business. For example, design may be considered functional requirements by some industries but is more typically considered non-functional.|
Type | | Examples of Functional Requirements | Business RulesCalculationsProcess FlowsUse Cases | Examples of Non-Functional Requirements | AccessibilityArchitectural Requirements Information Security RequirementsCompliance & Legal RequirementsService Management RequirementsDesign RequirementsDisaster Recovery RequirementsPerformance RequirementsOperational RequirementsQuality Requirements | Related Concepts | |
Next: Non-functional Requirements
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