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12 Types of Requirements Quality
John Spacey, updated on March 17, 2021
Requirements quality is the degree to which requirements map to business goals and support project execution. The following are common criteria used to evaluate requirements quality:
1. AtomicEach individual requirement refers to one thing and one thing only. In other words, requirements are broken down to their lowest level.
2. CorrectRequirements correctly meet business goals that are typically documented in a business case or business plan.
3. TraceableTraceability refers to the ability to map between different types of requirements. This most commonly refers to the ability to map between the business case and functional requirements. Traceability is important for assessing the impact of changes and ensuring that functional requirements support business goals.
4. CompleteA complete requirement includes any details that are needed to fully constrain it.
5. UnambiguousRequirements that aren't open to interpretation. This requires highly specific statements.
6. ConsistentEach requirement doesn't conflict with any other requirement. Requirements are also consistent with the target business and organization.
7. VerifiableThe requirement is verifiable. Common means of verifying a requirement include inspection, demonstration, measurement and analysis.
8. FeasibleFeasible requirements are possible given the constraints of the project and organization.
9. Design IndependentRequirements that don't place unjustified constraints on the design such as requesting that a favorite technology be used to implement a particular functionality. In many cases, technology specifications are included in the constraints section of a requirements document.
10. PrioritizedEach requirement is ranked in order of importance. This data is critical to project management activities such as project planning.
11. ConciseFree of extraneous information and wordage such as adjectives that aren't actionable.
12. ValidatedRequirements that are reviewed both at as a high level strategy and at the line item level by stakeholders and subject matter experts.
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