When [sc_task] closes, that wakes the workflow up on the RITM where the stage is set to "completed" and that closes the RITM, this is the order of out-of-the-box bus.rules that execute on [sc_req_item] that closes it

Finished executing business rule 'Set Active Flag' on sc_req_item
Finished executing business rule 'task closer' on sc_req_item
Finished executing business rule 'Set Closure Fields' on sc_req_item
Finished executing business rule 'metrics events' on sc_req_item
Finished executing business rule 'Close Parent if Required' on sc_req_item
Finished executing business rule 'Create Inventory Item' on sc_req_item
Finished executing business rule 'Moot Approvals Upon Cancellation' on sc_req_item
Finished executing business rule 'sc req item events' on sc_req_item
Finished executing business rule 'task events' on sc_req_item
Finished executing business rule 'Run SLAs' on sc_req_item
Finished executing business rule 'SNC - Run parent workflows' on sc_req_item
Finished executing business rule 'Reduce request price - item change' on sc_req_item