A heuristic evaluation of a website is one done not by studying users, but by reviewing a website against a list of known best practice criteria.
I love the checklist below. Nielsen/Norman came up with this list to guide a heuristic review. My favorite item is “Pages should push no unexpected animation or sound at users”. I think designers can get sucked into a self-absorbed, center-stage frame of mind. They might be spending more time thinking about winning awards than being aware of the below usability items.
General
- Do not obstruct or compete with users’ critical tasks.
- Present elements related to specific tasks based on frequency, importance, or sequence.
- Use buttons and links consistently. Always use the same label for the same function.
- Pages should push no unexpected animation or sound at users.
- Allow users to purchase without registering.
Page Layout
- Layout objects hierarchically to match the user’s expected task flow: left to right or top to bottom. Most users start by scanning the content area.
- Ensure manageable page lengths. Don’t use scrolling on home pages and make sure interior pages are fewer than 2.5 screens.
- Ensure that pages can be easily printed and that printing does not cut off critical information. If this is not practical, provide a printable version.
Visual Design
- Avoid using color as the only source of important data.
10. Don’t design critical information so it looks like advertising.
Navigation
11. Use persistent navigation to support frequent movement between tasks.
12. Don’t force users to hover over something to see options.
Sample Website Experience Best Practices
13. Link names should communicate the content of the page they link to. Avoid genetic links such as Click Here and More.
14. Underline all links. Do not underline any other words. Everything clickable should have a rollover effect.
15. Links should change color to indicate which links the user has visited.
Content
16. Use your user’s vocabulary.
17. Write content that is bloat free (short and simple), correct (spelling, grammar), in the active voice, and interesting.
18. Show price, or lack thereof.
19. Allow users to compare products side by side. Comparison tables should facilitate product differentiation.
Readability
20. Use 10-point font or larger for all text.
21. Maintain high contrast between background and text colors.
22. Use bulleted lists, introductory summaries, clear titles, and stand-alone chunks to facilitate scanning.
23. Use relative rather than fixed fonts.
Search
24. Display a Search box in the upper-right corner of every page.
25. Chunk search results into categories (for example, product information, support, press releases).
Sources: Nielsen/Norman, Human Factors International