This technique is most often used where there is a relatively unstable prototype or a written procedural specification. The ubiquitous presence of design team members usually inhibits free-floating comments from all but the most outspoken of users. Benefits Obtains reactions to a design in an informal manner. Flexible means obtaining reactions, allowing the discussion to range over issues not originally considered. Limitations Requires some form of prototype to show for user to react to.
Results are opinions rather than objective data.
Users may tend to react positively on seeing some prototype in operation. It may be difficult to imagine how the system will operate in the real environment. Cost of use Requires a prototype to be developed. The time overhead in holding the walkthrough sessions largely depends upon the task domain and the number of users exposed to the prototype. Procedure The general procedure for implementing this method is outlined in the following.