Do we know enough about the factors of the TAM model to predict the information system’s acceptance?

The acquisition and use of information are key factors in successful executive performance. Recently, EIS have been analyzed through the Technology Acceptance Model (TAM) with significant results. In order to answer the research question "Is additional qualitative research needed to find more valuable information about the factors of the TAM model?", we developed a deep literature review from three different perspectives and interviews to experts on EIS. The results suggested that more qualitative research is necessary to uncover more valuable information about the factors.