Customized steps in ChaRM workflow

Hello SolMan Gurus,

I am in a project implementing Change Request Management in Solution Manager. Now my client wants to add an additional customized step in the standard process flow. Let me explain in detail. When a change request has been created, before it reaches the approver my client wants to add an intermediate role who can either confirm or disapprove. Only if the intermediate person approves, should the change request go to the approver.

Could you please help me with this scenario on how to do customization when it comes to add new roles in the ChaRM.

Thanks.

Regards,

Pan