Through researching various sites into the properties of usability, the following aspects have been collected together to form a short list of the main components:
1. Design is clear with a simple navigation system – According to Web usability expert, Jakob Nielsen, a good navigation system should answer three questions:
- Where am I?
- Where have I been?
- Where can I go?
2. Content is clear and simple – You may attract visitors with an eye-catching design, but content is what keeps them at the site and encourages them to return. Content is also the best way to boost your site in search engine rankings.
3.Support your brand. A good brand creates or reinforces a user’s impression of the site. When your site is strongly branded, that means that visitors will think of you first when they go shopping for your product or service.
4. Provide for visitor feedback. Forms are critical to the success of ecommerce sites. Without forms, you can’t have a shopping cart. But any site usually needs at least one form to allow for user feedback.
Here are a few questions that can be asked when testing the usability of a web site:
- Do visitors enjoy using the site? If so, they’ll stay longer and read more content.
- Do they understand the purpose of the site? If not, there’s no compelling reason to return.
- Is there any incentive to return after the first visit? Your site should try to be the ultimate authority on the Web for your topic. A site with depth and breadth encourages visitors to bookmark it and refer friends interested in the same topic.
- Can they recover from errors? Usability testing is the best way to test how well your site search, site map, forms, and custom error pages function. They should all work together to guide a visitor through the site and help him get where he’s going. Frustrated visitors aren’t likely to return – ever.
The above information was found at http://www.netmechanic.com/news/vol7/design_no4.htm
The web site which i have decided to test is Tesco.
Colour Scheme – a white background with darker colours used in the foreground have been implemented into the site, this is a simple but effective scheme as it allows the user to concentrate on the site rather than get confused and distracted by the colours.
Fonts: a standard readable text is used with good use of text size on certain aspects such as main headings being larger than main body text. Good use of text spacing.
Site Layout: a consistant layout is used on every page with a predictable navigation system which will allow the user to feel comfortable with the site.
Images: most are of a reasonable size where appropriate which will help towards the download time, however some of the imaes appear to cluttered which can make the page a little confusing.
Links: there are several hyperlinks on each page, with various types doing various things. On some links the user can just click and enter the page they require, where as on others a drop down box appears. This can be a little fiddley and the links are situated so close together.
Ease of Use: the site is generally easy to use, but with there being so many links the use may get a little fed up with having to continually be clicking links for a specific page.