Here’s an example of a Business Event Flow Diagram tailored to a reservation system, illustrating how a typical business event (e.g., “Customer makes a reservation”) flows through the organization:

flowchart TD %% Event Trigger Customer[Customer Initiates Reservation] --> SubmitRequest[Submit Reservation Request] SubmitRequest --> ValidateInputs[Validate Input Data] ValidateInputs -->|Valid| CheckAvailability[Check Resource Availability] ValidateInputs -->|Invalid| RejectRequest[Reject Request with Error] CheckAvailability -->|Available| ProcessReservation[Process Reservation] CheckAvailability -->|Not Available| NotifyUnavailability[Notify Customer of Unavailability] ProcessReservation --> CreateEvent[Create Business Event: ReservationCreated] CreateEvent --> NotifyCustomer[Send Confirmation Notification] CreateEvent --> UpdateDB[Update Reservation Database] NotifyCustomer --> End[End] UpdateDB --> End[End] NotifyUnavailability --> End[End] RejectRequest --> End[End]

Key Elements:

  1. Event Trigger:
    The workflow begins when the customer initiates the reservation request.

  2. Validation Process:
    The system validates the submitted data (e.g., date format, resource availability). If the data is invalid, the request is rejected with an error message.

  3. Decision Point – Resource Availability:

    • If the resource is available, the reservation is processed.
    • If unavailable, the customer is notified of the issue.

  4. Business Event Creation:
    A ReservationCreated business event is generated, triggering downstream actions (e.g., sending notifications and updating the database).

  5. Parallel Actions:

    • The system sends a confirmation notification to the customer.
    • The reservation database is updated to reflect the new booking.

  6. End of Workflow:
    The business event flow concludes once all necessary actions are completed.

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