“…In many situations, the desiderata -goals, requirements, requests, wants, etc. -are unknown, ambiguous, disputed, inarticulable, changing, misunderstood or conflicting (Brooks 2010;Curtis et al 1988;Gladden 1982;Herbsleb et al 2005;Royce 1970;Shenhar et al 2001;Truex et al 1999;Walz et al 1993;Zheng et al 2011 implies that practices such as "freezing requirements" prior to design concept generation are counterproductive. Regarding the methodical/amethodical debate, SCI's assumptions are broadly more consistent with the worldview of amethodical development than with formal methods (especially document-driven methods).…”