Quality Requirement

A defined condition or capability used to verify that a result's quality attributes are acceptable and conform to agreed standards.

Key Points

  • Specifies measurable criteria or standards for quality attributes such as performance, reliability, security, or usability.
  • Guides quality planning, assurance, and control by stating what acceptable quality looks like.
  • Often expressed as metrics, thresholds, tolerances, tests, or acceptance criteria.
  • Is traceable to stakeholder needs and verified through inspection, testing, or analysis.

Example

A web service must return responses within 2 seconds for at least 95% of requests under a load of 500 concurrent users. During system testing, this requirement is measured to decide if the deliverable meets the project's performance quality expectations.

PMP Example Question

Which statement best describes a quality requirement?

  1. A document that lists all identified project risks.
  2. A condition or capability used to evaluate if a deliverable's quality attribute meets acceptance criteria.
  3. The process of monitoring and controlling project costs.
  4. A scheduled milestone indicating phase completion.

Correct Answer: B — a measurable condition used to judge quality acceptability

Explanation: A quality requirement defines how acceptability of a deliverable's quality attributes will be verified against agreed standards or criteria.

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