+-----------------------------------+

|        User Interface            |

|  (Customer & Internal Users)     |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|    Billing Application Layer      |

|   (Processing & Validation)       |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|       Billing Database            |

|   (Stores Billing Information)    |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|    External Services/APIs         |

|   (Payment, Tax Calculation,      |

|    Notification, etc.)            |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|     Billing Rules Engine          |

|   (Manages Complex Billing Rules) |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|    Automated Workflows            |

|   (Orchestrates Billing Process)  |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

|    Security Measures              |

|   (Data Security & Compliance)    |

+----------------+------------------+

                 |

                 v

+-----------------------------------+

| Analytics & Reporting             |

| (Collects Billing Data & Generates|

| Reports)                          |

+-----------------------------------+