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. 

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 

How to Calculate Probability of Detection?

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


  1. First, determine the total number of true positive defects. 
  2. Next, determine the total number of false negative defects. 
  3. Next, gather the formula from above = POD = TP / (TP+FN) * 100.
  4. Finally, calculate the Probability of Detection.
  5. 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 = ?