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Amazon supports the theory of consistency and

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Unformatted text preview: just shows an inventory number UPC: 0855959000201 which might be good for internal use, therefore it does not supports theory. User control and freedom According to Nielsen (1990) users generally choose system functions by mistake and will need a clearly marked "emergency exit" to leave the unwanted situation without having to go through an extended dialogue such as support undo or redo. The user control and freedom was very well managed in Amazon. User can easily navigate around Amazon portal using “Next Page”, “Previous Page” and “Amazon.com Home” options, therefore it supports the theory. Consistency and standards According to Nielsen (1990) consistency is the most important design principles for usable systems. This can be applied at multiple levels; at first a system should at the bare minimum be consistent within itself. The Amazon portal was found well consistent, since the information was arranged using “Product Categories” such as Books, Electronic, DVD’s etc. In addition, comprehensive “Search” option was available on every page, so that if customer wish to made new search he/she should not have to go all the way back, just to make new search. For selection purpose, check box button were used throughout the system, so that customer can easily make a choice among variety of options. Amazon supports the theory of consistency and standards. Error Prevention According to Nielsen (1990) good error messages that make sense to the user are always necessary. It is ideal to create a “careful design” which prevents a problem from occurring in the first place. In Amazon.com case, the portal is well designed that 82 prevent errors to occur. While conducting tasks from 9 – 14, the users could not face any errors. All links were fully operational, therefore it supports theory. Recognition versus Recall Nielsen (1990) recommends that the user's memory load should be minimized by making objects, actions, and options visible. The user should not have to remember information from one part of the dialogue to another part. Amazon is a public oriented (Business to Consumer) WAP portal. Hence, recognition is an important factor for Amazon. In task-13 & task-14 users added various products into “shopping cart” to test a complete business transition. By using “Shopping cart” user simply add products into system and system will “remember” (keep track) of all these added products using shopping cart. Due to this efficient recognition method, customers don’t have to remember anything, therefore Amazon supports the theory. Flexibility of use According to Nielsen (1990) system should be flexible to use for every one. Since, user’s levels of experience with systems can very; this leads to the necessity of having multiple “views” of users. System should be flexible to cater both inexperienced and experienced users. The Amazon portal is highly flexible. Users with different backgrounds (experienced and inexperienced) easily completed the tasks 9 - 14. The users reported that the portal is flexible to use, all portal features such as, contents, navigation, help up-to order processing, everything was easy to learn and easy to use. Therefore Amazon is good example of flexible portal and supports the theory. Aesthetic and minimalist design According to Nielsen (1990) dialogues should not contain information which is irrelevant or not often needed. The Amazon portal is good example of aesthetic and minimalist design. Most of the information is arranged using product categories such as “Books, Electronic, DVD” etc. In addition, any different product can be searched using “Search” facility. The user is guided sufficiently at various stages to carry out tasks successfully, therefore Amazon supports the theory. Sensible error messages According to Nielsen (1990) error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively suggest a solution. As for as, Amazon portal is concern, no error was reported. The users carried out task 9-14 without any major difficulty, therefore Amazon supports the theory. 83 Robustness According to Dix et al., (1993) a user engaged with a computer in order to achieve some goals in that specific business domain. The robustness of that interaction comprises features that support the successful achievement and assessment of that goal. In order to validate robustness in Amazon portal, task-13 “Find GPS under Electronics category and add to “Shopping Cart” to test a complete transaction” and Task-14 “Search any Microsoft product in software category and add into shopping cart” were analyzed. The objective of these tasks was to test the full business life cycle of Amazon.com portal. Both tasks were conducted successfully by using full features of the portal, such as “Product Search”, browse “product information”, add product into “shopping cart” up to payment. The response time was good. In case of spelling mistake in “S...
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