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Visibility: The state of the model is clear to the user. The tabs at the top of the window clearly show in which view the user currently is. The arrows at the start and end of each row are shown if there are more pictures to view in the respective direction, which allows the user to know if it is possible to scroll to view more pictures. Furthermore, this design does not have the visibility issue of Design 1 of not being able to see other albums while browsing through photos in a particular album.
*Efficiency: * The use of a separate page allows more flexibility for the search, so that a user could fill out multiple criteria for the search. For example, he could look for friends X and Y being tagged and albums with the name “MIT”. This would make it more powerful and faster for the user to find the picture he/she is looking for.
This design would also be very efficient for going through pictures after a search result looking for multiple tagged friends since, on average, there would be relatively few albums to scroll down through, and few pictures in each album that contain all the friends. Hence, the user would have to do very little scrolling, and would be able to find a specific picture very quickly.
*Error prevention and correction: * Overall, the interface is not prone to errors. The horizontal scrolling would feel very natural to the user and make it simple for him/her to navigate back and forth between albums in pictures.
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