A statistical measure using both statistical models and field testing to estimate the likelihood that a particular non-destructive testingRefers to a range of techniques and methods used to assess the integrity, quality, and properties of materials, components, or structures without causing damage… technique will detectTo sense or obtain a measurable indication from a feature. and accurately size a defectA flaw, anomaly, or imperfection in a pipeline that could compromise its integrity, safety, or performance. Defects can vary in nature, size, and severity and c… of a certain size or larger.