Enter the total number of true positive defects and the total number of false negative defects into the Probability of Detection Calculator. The calculator will evaluate the Probability of Detection.

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## Probability of Detection Formula

The following two example problems outline the steps and information needed to calculate the Probability of Detection.

POD = TP / (TP+FN) * 100

Variables:

- POD is the Probability of Detection (%)
- TP is the total number of true positive defects
- FN is the total number of false negative defects

To calculate the probability of defect detection, divide the total number of true positive defects by the total number of defects.

## How to Calculate Probability of Detection?

The following steps outline how to calculate the Probability of Detection.

- First, determine the total number of true positive defects.
- Next, determine the total number of false negative defects.
- Next, gather the formula from above = POD = TP / (TP+FN) * 100.
- Finally, calculate the Probability of Detection.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

total number of true positive defects = 300

total number of false negative defects = 40

POD = TP / (TP+FN) * 100** **= ?