Skill development issues are relevant to routine operation , in which skill can and should be developed. Skill development is less important for most recovery procedures, which are rarely used. However, it may be applicable to recovery procedures that are used often (such as the Undo feature in word processing).
Skill development issues are relevant to solving the Response Coherence dilemma (page xx) and the Situational Visibility dilemma (page xx). They imply that for routine operation, the dependency of the user actions on the context variables should be minimized; whenever possible, the system response to an action should be consistent. In addition, they imply that the context variables should be based on primary visual cues (graphical information) to enable at-a-glance recognition, when consistency is impossible to achieve.
Updated on 28 Feb 2016.