Disaster recovery planning

You have been asked to test the disaster recovery plan for a small business in your area. The company has a back up plan that is well documented.
Describe the steps you would use to test the plan to ensure that the backup plan would function in case of an actual emergency?
As a part of the disaster recovery planning at a medium-sized business, you have been asked to develop a project plan to test the backups of production systems.
Develop an outline of the project plan for the testing.