Importance of the COR and role and responsibilities

Explain the importance of the COR and role and responsibilities that they have performing COR duties for supply management and acquisition. The 3 different types of COR experience and training needed. The role they play as the eyes and hear for the contracting officer, some of the reports they perform, etc. give a couple of examples of high profile contracts COR worked on, etc. Explain how they work as part of the purchasing and acquisition management.