In the frame of the CRIZ’INNOV project, IMT Mines Ales is in charge of developing an observation tool in order to enhance vocational training of crisis managers. Using a research approach articulating research-design-training, the cooperation between Researchers, Engineers and Crisis Managers is fundamental. With co-design goal, the first step was to meet potential users and integrate their in everyday work practices. To reach this goal, interviews and observations were realised. Results allowed to identify needs, practices and to assess observation’s tool feasibility. These first outcomes have oriented characteristics of observation tool.