A business process model uses swimlanes to represent different roles, departments, or systems involved in a process. Hand-offs occur when responsibility for a task is transferred from one role or department to another.

Key Considerations:

Process Flow Lines Crossing Each Other: Crossing lines do not indicate hand-offs; they simply show the sequence of tasks.

Decision Point: A decision point represents a choice or branching in the process, not a transfer of responsibility.

Task Spanning Multiple Swimlanes: A single task spanning multiple swimlanes is uncommon and does not represent a hand-off.

Process Flow Crossing Swimlanes: When a process flow crosses from one swimlane to another, it indicates that responsibility for the task has been handed off to a different role or department.

Evaluation of Each Option:

A. By process flow lines crossing each other: Crossing lines are unrelated to hand-offs and may simply indicate parallel tasks. Conclusion: This is not correct .

B. By a decision point: Decision points represent choices or conditions, not transfers of responsibility. Conclusion: This is not correct .

C. By a task spanning multiple swimlanes: Tasks typically belong to a single swimlane, so this is not a valid representation of hand-offs. Conclusion: This is not correct .

D. By the process flow crossing from one swimlane to another: This accurately represents a hand-off, as it shows the transfer of responsibility between roles or departments. Conclusion: This is correct .

Final Recommendation:

Hand-offs are represented:

D. By the process flow crossing from one swimlane to another.