Sonia has been offered a job by two different companies. Since she is uncertain about which job offer to accept, Sonia makes a list of the features of each company. She then rates these features using a 10-point scale, with 10 being the best. Finally, Sonia adds up the ratings for each company. She accepts the job offer from the company that had the highest score. Sonia used the _____ model to help her make her decision.