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1A number of case studies are compiled at http://www. epss. com/lb/lb_index. htm. They cite, for example, a study reporting that the use of an EPSS for customer service employees reduced training time by 60%. Another study of the use of an EPSS for a front-end interface of a bank legacy system reports a reduction in on-the-job training by 75%, a reduction of time per task from 33% to 77%, and a similar reduction of errors.