One common practice is to offer one or more “guided tours” through the
exhibition via a mobile device. Typically, guided tours allow the
visitor to take a look at a predefined subset of exhibition “highlights”
in a reasonable amount of time (usually from 15 to 90 min).
Hence, visitors' selection processes are reduced to choosing a specific
tour and then following its path through the gallery without
further need for selection. Instead of providing visitors with a small
set of digital tours off-the-shelf, more advanced systems take visitor's
prior selection behavior into account, thereby identifying exhibits
that may be of particular interest to the individual visitor.
Usually, such context-aware recommender systems offer visitors a
small set of plausible choice options during his or her visit, again
reducing the necessity to choose to a manageable amount