Probability of detection (POD) seems like a relatively simple number which vendors use to reassure potential customers of a machine’s capabilities for contaminant detection. However, there is more to the numeric value of POD than just taking it for face value.
Adding x-ray inspection equipment to a production line is a serious matter and it is important to ask the right questions prior to selecting a supplier. Probability of detection is a value often provided by equipment manufacturers during the sales process. By understanding how this number is generated, processors can reassure they are prepared to discuss the data provided by the vendor, and factors that affect the probability of detecting contaminants to ensure long-term performance with consistent results and in a realistic environment.
This white paper explains how POD is calculated and why 100% POD is unachievable. It also looks at factors that affect sensitivity of contamination detection within an array of products and factors that affect detection such as contaminant placement, number of passes and number of false rejects created during the testing period. Lastly, it discusses how the latest innovations in x-ray inspection technology are designed to enhance detection performance, while explaining how food processors can ensure POD is consistent throughout the lifetime of their x-ray system.