Which operand allows for conditions to determine the execution of optional events?

The operand that allows for conditions to determine the execution of optional events is known as the 'opt' operator. This operand is specifically designed to represent scenarios where an action or event may occur based on a certain condition being true.

Using 'opt', you can illustrate that there is an optional pathway in a process, signifying that if a specific condition is satisfied, then the corresponding activities within that optional block will be executed. If the condition is not met, the optional events will simply be skipped, allowing the flow of the process to continue smoothly without the need to execute every possible event.

This is particularly useful in modeling scenarios where certain actions are not mandatory and depend on context or specific triggers, thus keeping the model clean and focused on the critical path while accommodating conditional behaviors.