Once the problem has been defined globally, the next step should include the detailed understanding of a target situation where measures are considered for implementation. Information can be collected from different data sources such as: behaviour reports, accident / suicide investigation report (if available), specific incident reports, or CCTV   footage.

The characteristics of the specific location should be considered: the environment, spatial configuration, history of the site, pre-existing measures and specific constraints. At this stage you can use relevant characteristics from a list to obtain more data (based on the categories within e.g., location – station, crossing, etc.), review of existing measures in targeted locations, conduct field visits, check the safety record, brainstorm with RU / IM experts, etc. Try to figure out what is needed at that specific site to eliminate / diminish the target incident.