Five kinds of product search HTML pages -a four-level hierarchy (3 x 3 x 3 x 3), a three-level hierarchy (9 x 3 x 3), a two-level hierarchy (27 x 3), a one-level hierarchy (81 x 1), and a frame structure (9 x 3 x 3)were prepared. Two kinds of task, a simple task and a complex task, were prepared. For the most complex task, a total of 22 clicks were required to complete the task. Then the subjects were asked to search for products over the Internet. They were also asked to evaluate ease of use of the web pages. A total of 89 subjects accessed the experimental pages. The access log was later statistically analyzed. The results were very productive. In most advanced research up to now it has been shown that reducing the number of hierarchies and increasing the amount of information in one screen can reduce the task performance time. Our test results have also shown that this is what happens when a complex task is performed. However, a different conclusion is drawn when a simple task is performed. When a simple task is performed, there were no significant differences in the search time required, whether there were 81 products included in one screen (81 x 1), or in a four-level hierarchy (3 x 3 x 3 x 3). In this case, more people evaluated the four-level hierarchy as being easier to use than a one-level hierarchy. In this study it was found that task performance times and ease of use depend on task complexity and they were not always directly related.
The method for constructing web contents was considered. The construction procedure is as follows. Elicit “user requirement” to find out the user demands and the web management side needs to clarify the “purpose” of what they want to solicit. Mark a check where each line and row corresponds to clarify the relation between both in the matrix by which user requirements and the purposes are arranged in lines and rows. To understand the systematic feature of the website itself, “grasping information” and “structuring information” are necessary. Finally, the structured web concept is created from the acquired information mentioned earlier, and this method of designing each page on the website based on the concept can be applied not only to the web contents but also to product planning as well. Finally, the website of a theatrical company was actually constructed using this method.
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