PMP: Accuracy vs Precision

PMP: Accuracy vs Precision

Refer to Project Quality Management,

  • Accuracy: a measure of how the measured values close to the target value
    • If the measured values are accurate, they may not be precise as they can be larger or smaller than the target value on a wide range.
  • Precision: a measure of how the measured values close to each other (but not necessarily close to the target value)
    • If we say the measurements are very precise, we do not give out any hint on whether the measurements are accurate (i.e. close to the target value).
  • Which is more important? Accuracy is MUCH MUCH MORE important than precision
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