“…They are commonly used in RCA to register and visualize the causal structures of problems. Various techniques to draw CED are introduced, e.g., a fishbone diagram (Burnstein, 2003;Stevenson, 2005;Andersen and Fagerhaug, 2006;Ishikawa, 1990), a fault tree diagram (Andersen and Fagerhaug, 2006), a directed graph (Bjørnson et al, 2009), a matrix diagram (Nakashima et al, 1999), a scatter chart (Andersen and Fagerhaug, 2006), a logic tree (Latino and Latino, 2006), and a causal factor chart (Rooney and Vanden Heuvel, 2004). However, only few of them are utilized in software project retrospectives.…”