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246          Khaled Alshareef, Ahmad Rahal and Mohammed Basingab

                                    Table 5. Simulation Summary-ED Performance Indicators

                                                                                            Wed.
                                                                  Mondays    Tuesdays   Thursday, &
                                    Day of the Week                 Peak       Peak     Fridays Peak
                                                                  Arrivals   Arrivals
                                                                                          Arrivals
                        Utilization Rate: Doctors                  99.20%     99.18%       99.15%
                        Utilization Rate: Nurses Accompanying      99.20%     99.18%       99.15%
                        Doctors
                        Utilization Rate Triage Station            84.63%     61.84%       58.63%
                        Average Time Triage Station (minutes)       18.6        5.4          5.4
                        Utilization Rate: Registration Station     66.72%     47.56%       61.56%
                        Average Time Registration Station (minutes)   1.2       1            1
                        Utilization Rate: First Assessment station   99.20%   99.14%       99.11%
                        Average Time in First Assessment Station (Hrs)   5.3   5.14         4.78
                                       nd
                        Utilization Rate: 2  Assessment Station    57.67%     53.72%       61.56%
                        Average Time in 2nd Assessment Station       63        53.4         58.2
                        (minutes)
                        Utilization Rate: Lab Test Station         44.94%     46.35%       46.73%
                        Average Time in Lab Station (Hours)          18        13.8          15

                                                 Table 6. Alternative 1 details

                                      Alternative 1: Hire one more doctor and one more nurse
                            Working            Night Shift         Day Shift          Evening Shift
                            schedules     (12:00 am - 8:00 am)   (8:00 am - 4:00 pm)   (4:00 pm - 12:00 am)
                        Physicians                 2                   2                   2
                        Nurses                     2                   2                   2
                        Registration Nurses        1                   1                   1
                        Triage Nurses              1                   1                   1

                          Alternative 2: hire two more doctors and two more nurses, and schedule the most
                       resources in the evening shift since more patients visit the ED during that time. See Table
                       7 below.

                                                 Table 7. Alternative 2 details

                                     Alternative 2: Hire two more doctors and two more nurses
                                             Night Shift
                            Working                               Day Shift          Evening Shift
                            schedules      (12:00 am - 8:00   (8:00 am - 4:00 pm)   (4:00 pm - 12:00 am)
                                                 am)
                        Physicians                2                  2                    3
                        Nurses                    2                  2                    3
                        Registration              1                  1                    1
                        Nurses
                        Triage Nurses             1                  1                    1
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