Zero Quality Control is an method/approach for achieving zero defects in an organization.  Zero gives reference to the objective of ZQC which is to produce products/services with zero defects.  The approach was first out lined in the book Zero Quality Control: Source Inspection and the Poka Yoke System which outlined the main concepts of the ZQC approach and included many case studies.  

  Zero defects was a strategic goal that Mr. Philip Crosby made popular.  The objective was to achieve zero defects and required management to support and commit their efforts to not only never passing on a defect but doing things right the first time.