Accuracy
In quality management, accuracy refers to how closely a result or measurement matches the true or correct value.
Key Points
- Indicates the degree of correctness of a result or output.
- Different from precision, which relates to consistency or repeatability.
- High accuracy means results are very close to the actual or desired value.
- Used as a measure of quality in project deliverables and processes.
Example
During quality control testing, if a project team measures the length of a component and the result is 100.1 cm when the true length is 100 cm, the measurement is considered accurate.
PMP Example Question
Which of the following best describes accuracy in project quality management?
- The ability to produce consistent results repeatedly.
- The closeness of a measurement to its true or intended value.
- The number of defects identified during inspection.
- The process of ensuring deliverables conform to specifications.
Correct Answer: B — The closeness of a measurement to its true or intended value.
Explanation: Accuracy is about how correct or exact a result is, while precision refers to the repeatability of measurements.