Based on aeronautics projects, two different hazard analysis approaches for using ARP4754A are compared. An integrated and a distributed environment approach are introduced and each project is allocated to one of them. The experiences made with both approach implementations were described. In addition, a discussion of the analysis, process, and tools used is given from a holistic perspective. It was disclosed, that a successful implementation depends on the infrastructure, the tool availability and the desired reusability degree of engineering knowledge.