Quality Metrics

A defined project or product characteristic along with the method, units, and criteria used to quantify and assess it.

Key Points

  • Specifies the attribute to evaluate, how it is measured, data source, units, frequency, and target or threshold.
  • Derived from requirements, standards, and the quality management plan; guides quality assurance and control activities.
  • Enables objective acceptance and monitoring through tools like control charts, check sheets, and dashboards.
  • Must be clear, measurable, and traceable; vague metrics lead to inconsistent results and rework.

Example

Manufacturing project: "Scrap rate <= 2% per batch, measured at end-of-line inspection using the MES; reported weekly by the quality team."

PMP Example Question

Which of the following is the best example of a quality metric?

  1. A flowchart showing the steps of the inspection process
  2. Rework rate under 5% of total effort, measured monthly from timesheets
  3. A general statement that the organization will delight customers
  4. A list of risks prioritized as high, medium, or low

Correct Answer: B — Rework rate under 5% of total effort, measured monthly from timesheets

Explanation: Option B defines an attribute, the method of measurement, units, and a target threshold, which is what a quality metric requires.

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