Estimation of weld defects size distributions, rates and probability of detections in fabrication yards using a Bayesian theorem approach

•A method for estimating POD curves based on Bayesian theorem was presented.•Weld quality assessment of ships from a defect size and rate perspective.•Comparison weld quality control programme as far as NDE POD is concerned.•Provides valuable inputs for estimating the fatigue reliability of newbuilt ships.