The design specification 6. Prototyping the system 7. Performing usability analyses 8. The testing of the prototypes can be either analytical or empirical. These methods yield somewhat different results.
Empirical methods give more reliable results but take more time and effort to perform.
Analytical methods often come up with somewhat different problem areas. Analytical testing Analytical testing is performed in two stages. First, the sequence in which the activity of interest is performed is determined, either through walkthrough methods by the designer or by empirical testing. Then, the sequence is analyzed for usability. The book introduces three walkthrough methods for this and one method that does not rely on walkthroughs.