Chapter 15: Evaluation: Inspections, Analytics, and Models

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As you do this assignment we suggest that you start by reviewing Nielsen’s heuristics and deciding which are appropriate for evaluating the web-based ticketing system. You will also need to think about how many heuristics you wish to use. More than 10 are likely to be hard to remember and less than 7 will probably not provide the detail you need. If possible you could explore the effect of having more than one expert evaluator – for example you could work on developing the heuristics with a friend, then you could each do your own evaluation and compare the results that you obtain. Do you both identify the same problems? Having completed the evaluation you will need to decide which of the problems are most important and need to be fixed in the prototype design. Some may be quite easy to fix and will have a big impact; others may require a much larger redesign than you can do; or require more effort than is warranted for the benefits to be derived.

Based on your findings redesign your prototype to address the main issues that you discovered from your evaluation.

The next part of the assignment is designed to encourage you to compare heuristic evaluation with the usability testing that you did for the assignment in the previous chapter. After you've made your comparison, you may want to look to see what other researchers have found in their comparisons by searching www.hcibib.org, the ACM digital library (if your university is a member), our other web resources, or the web for other research papers.