Percoba'an

            d.  Data Flow Diagram

                                                            Bagan III.3

                                                           DFD Level 1

                                                            Bagan III.4

                                                           DFD Level 2

                                                     Pengolahan Data User

                                                            Bagan III.5

                                                           DFD Level 3

                                                 Pengolahan Data Pelanggan

                                                            Bagan III.6

                                                           DFD Level 4

                                                     Pembayaran Rekening

                                                            Bagan III.7

                                                           DFD Level 5