1. Go to PLM > Configuration > ECO Stages: there're all stages with 2 type (New Product Introduction and BOM Updates)

2. Set approval rule for each stage

Choose the stage > Set approvals

For ex: I set approval role for stage "Validate" is Marc Demo

Approval role for stage " In Progress" is Mitchell Admin

Noted: For final stage "Effective" checked box "Final Stage" 

3. Go to Changes > ECO Batch > Create ECO Batch > Fill all the existed fields > Create Batch > Create New Revision 

For ex: I choose type New Product Introduction which I already setup

Apply on Product and BOM: linh product test 1

4. After Start New Revision > It turn to stage "In Progress" then in ECO's tab: status and Stage changing to In Progress

In Approvals'tab: check Requested Users to get next stage  > Click Approve button > Update State

5. It change to stage "Validated" then

the next Requested Users is Marc Demo 

so you need to log in as Marc Demo to approve this stage > Approve > Update State 

6. The stage right now is Effective so you can Apply Changes > so 2 ECO0056 and ECO0057 both applied.