As rationing decisions become more of an immediate reality for healthcare practitioners it is important to design mechanisms that facilitate carefully deliberated outcomes. No individual can be expected to be able to cover wide debate on their own, so an exercise has been designed that helps generate consensus decisions from diverse opinions. The exercise was piloted with two groups, an undergraduate medical class and the members of a general practice. Though the aims were different for each group, the tool was useful to both for producing the desired outcomes. Expert and non-expert knowledge were drawn upon and rationing prioritisation lists regarding funding of infertility treatment were generated. A description of the exercise and the results produced by the two groups are provided, as well as the theoretical placement for the significance of forming consensus from diversity.