The design of the HSI should draw the user's attention to points where operational sequences that have multiple steps in common begin to diverge from each other.
Additional Information:
A capture error occurs when an infrequently performed action requires a sequence of operations that overlaps with the sequence required for a frequently performed action. In attempting the infrequent action, the frequent one is performed instead. For example, a user intends to perform task 1, consisting of operations A, B, C, and D, but instead executes the more frequently performed task 2, (composed of operations A, B, C, and E). Capture errors often occur at the point of divergence of the frequently and infrequently performed sequences. HSI design efforts may be directed at that critical point to bring it to the user's attention. For example, if the control system knows the user's intention (e.g., by requiring an indication of the overall intention), it could highlight the proper path at the choice point, or initiate a warning if the wrong one is taken. Another approach is to draw the user's attention to important choice points (i.e., points where the sequence of operations differs from the sequences of similar tasks) by coding, labeling, and caution messages. Yet another way is to incorporate features drawing attention to the operational significance of alternative paths and supporting an understanding of which path has been taken.