A computer system records when employees enter and exit a workplace, thereby producing time and attendance data for each employee. Each supervisor is able to configure computer generated reports that contain designated information about the employees for whom a respective supervisor is responsible. A separate summary data file stores report data for each employee and the report data are updated automatically as the employee completes a period of work. The supervisor creates a report profile which specifies items of report data that are to appear on a particular report and whether only employees with an item of report data within a selected range are to appear. Reports are produced for a supervisor by using the respective report profile and summary data files for those employees associated with that supervisor.