Operationalising analytical inclusive design evaluation

Functional capabilities in Inclusive Design may be characterised by thresholds or human performance envelopes for users with variable or reduced functional capacity. In order to validate the effectiveness of this framework, an experimental approach is reported that compared human performance and measures of perceived difficulty with actual measurements of demand for a range of products and users and with varying capability ranges. This paper explores some of the operational assumptions, for the validation study, their rationale, some quantitative results and the physical and human constraints of the test situation that had to be considered.