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Requirements vs Specifications

 , updated on November 02, 2016
Requirements are descriptions of the future. This is a broad term that can include high level ideas for a product, service, experience, building, facility, technology or infrastructure.
Specifications are detailed descriptions of the present or future that can be interpreted without much ambiguity.

Requirements vs Specifications

Requirements may begin as high level ideas that are refined over time to become requirements specifications that are detailed enough to be created by a subject matter expert without much need for interpretation.
The term specifications extends beyond requirements specifications to detailed documentation of non-functional requirements, designs, standards, products, services, processes, methods, interfaces, practices, buildings, facilities, infrastructure, equipment, vehicles, technologies and documentation templates.
Requirements vs Specifications
RequirementsSpecifications
DefinitionDescriptions of the future.Descriptions of the present or future in enough detail to avoid ambiguous interpretation.

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Specifications

The common types of specification.

Requirements

The common types and formats of requirements.

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The difference between functional and non-functional requirements explained.

Functional vs Behaviorial

The difference between functional and behavioral requirements explained.

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A few examples of non-functional requirements.

Requirements Traceability

A definition of requirements traceability with examples.

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Function vs Feature

The difference between functions and features.

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