MAP-01-011 HFI Technical Guide - Human Factors Integration ...

MAP-01-011 – HFI Technical Guide (STGP 11)endeavour”, and it is by this process that problems arise. Furthermore, thetechnique makes the assumption that actions are constrained by the state of theproduct at any particular point in the interaction, and that the device offersinformation to the user about its functionality. Thus, the interaction betweenusers and devices progresses through a sequence of states. At each state, theuser selects the action most relevant to their goal, based on the System Image.• Advantages• Structured and thorough procedure.• Sound theoretical underpinning.• Flexible, generic, methodology.• TAFEI can include error reduction proposals.• TAFEI appears to be relatively simple to apply.• TAFEI represents a flexible, generic method for identifying human errorswhich can be used for the design of anything from kettles to computersystems.• Disadvantages• Not a rapid technique, as HTA and State Space Diagrams (SSD) areprerequisites.• Requires some skill to perform effectively• Limited to goal-directed behaviour• TAFEI may be difficult to learn and also time consuming to train.• It may also be difficult to acquire or construct the SSDs required for aTAFEI analysis. A recent study investigated the use of TAFEI forevaluating design induced pilot error and found that SSDs do not exist forBoeing and Airbus aircraft.A3.10.14 HERAThe Human Error Recovery Assessment (HERA) framework is a prototypemultiple method or ‘toolkit’ approach to human error identification that wasdeveloped in response to a review of HEI methods, which suggested that nosingle HEI/HRA technique possessed all of the relevant components required forefficient HRA/HEI analysis. In conclusion to a review of thirty-eight existingHRA/HEI techniques it was suggested that the best approach would be forpractitioners to utilise a framework type approach to HEI, whereby a mixture ofindependent HRA/HEI tools would be used under one framework.May 2006 Page A3-102 Issue 4