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.
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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- Fall '13
- The Land, Usability