The article on the fatigue life prediction of welded steel components using geometric scan data by Robert Lang addresses the service life assessment of welded steel components subjected to cyclic loads. Traditional methods rely on empirical data and provide rough geometric guidelines. Advances in scanning technology and numerical mechanics have led to interest in using real geometric data for better life assessment. This article discusses current practices, the problem of notch sensitivity, and the use of scan data for stress calculation. Full article see pp. 89.