Abstract
Human error is a significant contributor to product failure. However, it is uncommon for designers to explicitly consider the potential for human error in the design of products. In this chapter, it is proposed that ‘human error’ arises as a consequence of the interaction between user and product, and that modeling this interaction can allow insight into possible error paths. Using a simple representation of product functioning, based on state-space diagrams, Task Analysis for Error Identification indicates paths between states that are open to the user but which do not support the achievement of the user’s goal; such paths are considered to be erroneous. From this perspective, one of the aims of product design is to minimize paths to error.
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