Hot answers tagged e-commerce
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Whether or not you need to decompose the task into so many levels depends on the task complexity or amount of content. There's also the classic depth-breadth tradeoff. In general with web apps, where you have large windows and slow page loads, you're better off with a few complex pages in a simple hierarchy than a lot of simple pages in a complex hierarchy. ...
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I don't think an optimal number exists as each application is different, see this link short term memory and web usability.
4 levels of sub tabs (!) probably means that the Information Architect, if any, missed something. Multiple groups of nested tabs tells me that the application is overly descriptive instead of having been thought for what users are ...
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