Approval and pre-provisioning workflows are triggered when service requests are made by users. Approval workflows allow you to handle pre-deployment activity for both new service requests and change requests. Some example tasks covered by an approval workflow include:

• Obtaining approval or rejection of a service request
• Tracking emails about the approval
• Running pre-deployment scripts
• Approving or rejecting service requests based on quota.

http://www.embotics.com/documentation/index.html?set_up_approval_workflow.htm