This article deals with Zero Acceptance Number chained quick switching system indexed by six sigma quality levels. A zero acceptance number(Ac=0), is well- known as a zero defect sampling plan (d=0), accept the units in the sample. It leads to the Chained Quick Switching System having zero acceptance numbers, assigned such as ChQSS-1 system. The ChQSS-1 indexed by six sigma quality levels and relative slope(h0) and Tables are constructing for easy selection method.

Keywords : Chain Sampling; Producer’s Risk; Consumer’s Risk; Operating Characteristic Curve; Quick Switching System, Relative Slope, Six Sigma Levels.