A Guide to Effective Contractor Quality Control (CQC): Effective control of construction operations instills pride in work, gains favorable recognition, and saves the contractor money. This booklet explains the Corps* concept of CQC and can assist the contractor to bring about effective control. It does not attempt to tell the contractor how to manage its organization orĀ construction efforts but passes along some reminders of lessons learned and some suggestions as to just what the Corps of Engineers is looking for from the contractor regarding Quality Control.