Accuracy vs Precision

Accuracy vs Precision

→ The difference between Accuracy and precision is explained below with various examples, Accuracy and precision are a similar looking word but has a difference.


1) Accuracy:

    ➧ The Accuracy of a measurement system is the degree of closeness of
        measurements of a quantity to that quantity's actual (true) value.
    ➧ Accuracy is how close a measured value is to the actual (true) value.

2) Precision:

    ➧ The Precision of a measurement system is the degree to which repeated
        measurements under unchanged conditions show the same results.
    ➧ Precision is how close the measured values are to each other.
    ➧ Precision in MSA is related to repeatability and reproducibility


➤ Four Possibility of the measurement system - Accuracy vs precision

    ➧ Case 1: A measurement system has poor precision and poor accuracy
    ➧ Case 2: A measurement system has good precision and poor accuracy
    ➧ Similarly Case 3: A measurement system has poor precision and good accuracy
    ➧ Then Case 4: A measurement system has good precision and good accuracy

Accuracy vs Precision

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