Cotton production in Australia is a high-tech industry. Genetically engineered cotton varieties, precision agriculture with self-steer tractors and variable rate applicators, and satellite generated yield predictions are all indicators of technologies being adopted by the cotton industry. In contrast, debate over the usefulness and useability of computer-based decision support systems (DSSs) and simulation models continues even after 25 years of their development for and promotion to the Australian cotton industry (Hearn and Bange, 2002).