chapter  17
24 Pages

Interface Evaluation

The complex issues involved in evaluation and generalization described in the previous chapter strongly suggest a need to categorize the various types of research that one might conduct in terms of complexity, ¤delity, and control. Rasmussen et al. (1994) have devised a framework for evaluation from the cognitive systems engineering perspective that accomplishes this goal. This evaluative framework consists of ¤ve nested, hierarchical levels that are de¤ned in terms of the “boundary conditions” or “constraint envelopes” that can be used to categorize alternative evaluative settings, as illustrated in Figure 17.1.