Instead of striving to avoid mistakes, we could simply turn it around and reinforce the positive aspects of our successes. Something that Ernst Mach (1838-1916) also knew: Success and failure come from the same source. Only in the result can they be distinguished from each other. Christiane Heuerding and Jörg Leonhardt strongly believe that reflecting on and investing in things which go well are vital for proactive safety management. Christiane therefore had the idea of using the well-known term the “dirty dozen” for it and converting it to a “clean dozen”. Gordon Dupont developed this idea in order to categorise frequent human errors. Christiane and Jörg will tell us how to change this “dirty-driven” view of errors into a “clean-driven” view of strengths and potentials.