A case study is a way to test the applicability of a theory using real-world evidence. The intent is not necessarily to select a successful or unsuccessful example, but rather to demonstrate that leadership is a key element in project management, and a project cannot succeed without it. The selected case is tested in this step, with the purpose of showing how leadership skills affect projects. The case study selected is Skanska, a major international construction company. The internal management system, as well as the company’s leadership philosophy and style demonstrated during each construction project, are presented. Projects.