摘要Objective: To develop a validated and generalized high reliability organizations collaborative tool in order to conduct common assessments and information sharing of potential risks during mass-gatherings. <br> Methods: The Swedish resource and risk estimation guide was used as foundation for the development of the generalized collaborative tool, by three different expert groups, and then analyzed. Analysis of inter-rater reliability was conducted through simulated cases that showed weighted and unweightκ-statistics. <br> Results:The results revealed a mean of unweightκ-value from the three cases of 0.37 and a mean accuracy of 62%of the tool. <br> Conclusions:The collaboration tool,“STREET”, showed acceptable reliability and validity to be used as a foundation for high reliability organization collaboration in a simulated environment. However, the lack of reliability in one of the cases highlights the challenges of creating measurable values from simulated cases. A study on real events can provide higher reliability but need, on the other hand, an already developed tool.