How critical is ease of use in adapting an information technology: an empirical study

The tests were designed to provide evidence of differences among the perceptions of ease of use among professionals, semi-professionals, and non-professionals before and after a major computer information system is installed. The results of the tests show that the perceptions about the computer system were very stable over the 15 month implementation period for all employees, particularly professional staff. There were a large number of differences in perceptions among the three occupational groups prior to the implementation but fewer after the system became operational. In fact, the differences in perceptions between professionals and semi-professionals almost disappeared following implementation while the differences between semiprofessionals and non-professionals widened