📄Specification

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Also known as: Requirements, Design Document

Detailed, precise description of requirements, behavior, or design that guides implementation and verification.

DESCRIPTION

A specification captures what a system must do and how it should behave, enabling alignment among stakeholders. It ranges from high-level requirements to formal interface and protocol details. Clear, testable specifications reduce ambiguity, aid validation, and accelerate delivery. Specifications may be vendor standards, open standards, or internal documents. They serve as baselines for contracts, compliance, and change management.

ALTERNATIVE DEFINITIONS

Wikipedia

A specification often refers to an explicit set of requirements to be satisfied by a material, product, or service.

Highlights explicit, requirement-focused nature across engineering contexts.

Source

Wikipedia

A software requirements specification (SRS) is a description of a software system to be developed, laying out functional and non-functional requirements, and may include a set of use cases.

Focuses on software-specific requirements documents and their typical contents.

Source

RELATED TERMS

Protocol Software Requirements Specification Architecture Document Interface Definition Test Case User Story Acceptance Criteria Contract RFC Design Patterns

COMPETING TERMS

Implementation

RELATIONS

• Narrower: OpenAPI Specification

KNOWLEDGE AREAS

Software Engineering Data Architecture Data Management Testing & Validation

TARGET AUDIENCE

Software Developer Data Architect Enterprise Architect Data Management Consultant Data Strategy Consultant Chief Technology Officer

EXTERNAL SOURCES

• Wikipedia - Specification
• W3C - Catalog of web technical specifications
• RFC Editor - IETF RFCs and Internet standards
• ISO - International standards catalog

TOP QUESTIONS

Why is a Specification crucial in software projects?

It aligns stakeholders, reduces ambiguity, and guides testing. Clear specifications avoid costly rework and accelerate delivery.

Category: Relevancy

What makes a good Specification?

It is clear, testable, consistent, and versioned. It includes acceptance criteria and traces to requirements and design.

Category: Requirements

How does a Specification differ from an Implementation?

Specification defines intended behavior; implementation realizes it. Tests verify conformance to the specification.

Category: Misunderstanding

What are common mistakes in writing Specifications?

Ambiguity, missing edge cases, and lacking non-functional requirements. Poor versioning causes confusion and scope creep.

Category: Mistakes

Can Specifications be executable?

Yes, formal specs and DSLs can be validated or executed. Examples include OpenAPI, JSON Schema, or formal models.

Category: Example

How are Specifications maintained over time?

Use version control, change logs, and governance reviews. Link specs to tests and design artifacts for traceability.

Category: Management

What risks arise from poor Specifications?

Misalignment, defects, compliance issues, and delays. Projects may fail due to misunderstood requirements.

Category: Risk

What is a competing term for Specification?

Implementation is often contrasted, representing the realized system. Standards also serve as external specifications.

Category: Alternatives

Where to learn writing effective Specifications?

Study standards (W3C, IETF), SRS templates, and modeling. Practice with OpenAPI and JSON Schema.

Category: Getting-Started