Not Sure how your change Process is setup. However you can either Revise the change notice instead of "Rework" or add custom expression robot to start the workflow process for Change task
Revise
This is slightly complex to implement. Modify workflow to assign 1st activity after revision should go to Change Admin to decide which change tasks needs to Revise or start from beginning in case you have multiple change task and only one change task needs to modification
Custom Expression Robot
Add expression robot after Audit Task for “Rework”. Use windchill API’s to collect and change task of change Notice and change the state to Open (1st state of Lifecycle to start workflow). below are the two API’s you may need to use
ChangeHelper2.service.getChangeActivities(theOrder);
LifeCycleHelper.service.setLifeCycleState(theTask, "THESTATE");
Hope it helps!!
Thanks
Shreyas