I have a parent object - Opportunity and a child custom object - Child_Opp. I have workflow rule created on Opportunity Object. I have a field in Opportunity object which refers to a field in Child_Opp object. Field_opp in Opportunity has a value of Child_Opp__r.Field_child_opp.
So basically in my opportunity I have a field(Field_opp) which gets its value from a field(Field_child_opp) in Child_Opp object. My questions is can I include the field(Field_opp) in rule criteria of my workflow rule( created in Opportunity Object) . When I change the Field_child_opp, the workflow rule should execute . Can this be possible?