## 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

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