Navigation through Information Hierarchy

Physical screen arrangement Does your system have Would more screens help is satisfactory a large display  

Easy to navigate through Navigate hierarchy the screen hierarchy quickly enough  

FIGURE 11.14 Percentage of operators responding yes to questions on navigation. 

1 The number of screens must allow for complete access to all necessary information under all operational circumstances. 

2 The design should allow for a permanently viewable overview display format. 

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There are also many information visualization techniques, each one with its advantages and disadvantages the use of a sort of combination to provide a real solution to end users is very frequently required. Spence [6] and Card et al. [7] provide excellent surveys of information visualization mechanisms and techniques. We support our visualization through the use of a grid-based structure, selection, navigation, filtering and zoom interaction mechanisms, in addition to polyfocal display, a tree hierarchy (a directed graph) and a time line as visualization techniques. 

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