“…These constructs are defined by an individual's "worldview", the problem structuring approach acknowledged these and worked with them #29 , #119, #120, #128, #134, #154, #190, #224, #238, #365 6 Messiness The problem context in which the problem structuring approach was used was recognised as messy|wicked|swampy following definitions such as contained in (Ackoff, 1979(Ackoff, , 1981Rittel & Webber, 1973;Rosenhead, 1992;Vennix, 1999) #22, #24, #40, #239…”