Chapter of a full book of case studies aimed at students. The main case is based on analysis of fatigue in the pipes of a nuclear power plant after many years of operation. The chapter pays especial attention to the differences between what engineers are taught at college and what they (we) have to face in real life. A list of tips like trying to image mechanical situations, avoiding black boxes and explaining results even before obtain them are given. There are links to repositories with example cases using Fino and wasora. The full book will be available at NAFEMS by mid 2019.