Advanced Customization > Business Logic Customization > Customizing MPMLink > Customizing Change Number Criteria
  
Customizing Change Number Criteria
To search for upstream changes based on a change notice created for an upstream part, enter the change notice or change task number in the Change Number box. The changes made on the resulting objects listed in the change notice or change task are detected.
You can customize the search criterion for Change Number to detect the changes made through a promotion request instead of a change notice. To do so, create a custom delegate and override the following method in the ReconciliationDelegate file located at com/ptc/windchill/associativity/reconciliation:
void populateChangeItemsFromChange(ReconciliationContext context) throws WTException;
This customization overrides the existing logic to use a promotion request number as an input for the Change Number box.