You stop the processor. You send a delayed message to an object that isn’t stopped. You let resume the stopped processor by this message. The delay time can be statistical distributed.
Process Flow
The same doing, but instead of a message event to delay resuming, you need only an delay activity.
Another approach: You use the setup time of a processor to initiate a repair or maintenance of the processor for the n-th item. Here you can call very simple an operator to assist the setup.
