A creditors committee is usually appointed by the U.S.Trustee from among the 20 largest, unsecured creditors who are not insiders. The committee represents all of the creditors in providing oversight for the debtor's operations and a body with whom the debtor can negotiate an acceptable plan of reorganization. A Chapter 11 plan is confirmed only upon the affirmative votes of the creditors, who are divided by the plan into classes based on the characteristics of their claims, and whose votes are a function of the amount of their claim against the debtor. If the debtor can't get the votes to confirm a plan, the debtor can attempt to "cram down" a plan on creditors and get the plan confirmed despite creditor opposition, by meeting certain statutory tests. There are exceptions in emergency situations or where the U.S. trustee (or bankruptcy administrator) has determined that there are insufficient approved agencies to provide the required counseling. If a debt management plan is developed during required credit counseling, it must be filed with the court.
http://www.uscourts.gov/services-forms/bankruptcy/bankruptcy-basics/chapter-11-bankruptcy-basics