Guiding the Process of Requirements Elicitation through Scenario Analysis: Results of an Empirical Study

ion P ro po tio n of s ub je ct s No guidance Using CREWS-L'Ecritoire Figure 5 : distribution of subjects having identified collections of complementary system functions having given rates of quality 7 Evaluation of hypothesis H8 To evaluate hypothesis H8, the subjects were requested to identify several system functions hidden within a scenario they were provided with. Three system functions were expected. A relatively small proportion of subjects (15%) was able to identify the expected system functions without guidance; we observed a significant improvement when subjects were provided with the adequate guidance. This is shown in Figure 6 which compares the subjects’ ability to perform correctly the task with and without guidance. As Figure 6 shows, 39% of subjects who did not distinguish the three expected system functions without guidance were able to identify all of them once they were guided.