Start Event: Order Received

Intermediate Event: Order Registered

Conditional Event: Current Date is not a working day

Timer Event: Wait until the following working day

Intermediate Event: Availability Check Performed

Send Task: Purchase Order Response Sent

Intermediate Event: Any Item Not Available

End Event: Purchase Order Cannot be Further Processed

Intermediate Event: Purchase Order Cancel Request Received

Interruption Boundary Event: Purchase Order Handling Process Interrupted

End Event: Purchase Order Cancelled

Intermediate Event: Customer Address Change Request Received

End Event: Customer Address Change Request Registered

The BPMN event symbols used in the diagram are:

• Start Event: This symbol represents the beginning of the business process.
• Intermediate Event: This symbol represents an event that occurs during the business process.
• Conditional Event: This symbol represents an event that determines the flow of the business process.
• Timer Event: This symbol represents an event that is triggered by a specific time or date.
• Send Task: This symbol represents a task that sends a message to another participant in the business process.
• End Event: This symbol represents the end of the business process.
• Interruption Boundary Event: This symbol represents an event that can interrupt the flow of the business process.

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Explanation:

The order handling process starts with the Order Received start event. The order is then registered, which is represented by the Order Registered intermediate event. If the current date is not a working day, the process waits until the following working day by using a Conditional Event and a Timer Event. Otherwise, an availability check is performed and a purchase order response is sent back to the customer using a Send Task.

If any item is not available, the process is interrupted by the Any Item Not Available intermediate event and the Purchase Order Cannot be Further Processed end event is triggered. Otherwise, the process continues.

At any time during the process, the customer may send a purchase order cancel request. This is represented by the Purchase Order Cancel Request Received intermediate event and the Interruption Boundary Event. When such a request is received, the purchase order handling process is interrupted and the Purchase Order Cancelled end event is triggered.

The customer may also send a Customer Address Change Request during the order handling process. This is represented by the Customer Address Change Request Received intermediate event. When such a request is received, it is just registered, without further action, using an End Event.

The order handling process ends when the Purchase Order Cannot be Further Processed or Purchase Order Cancelled end event is triggered. (SOMEBODY PLEASE DRAW A DIAGRAM FOR ME ON A BPMN TOOL OR ON PAPER JUST PLEASE SHOW ME A DIAGRAM)