Development of multi stage multiple sampling plans for variable quality characteristics

The main advantages of variable sampling plans are the existence small sample size for effective decision and receiving good information on quality characteristics. But samples some time may lead to wrong during inspection lot can increase risk producer or consumer. same scenario happen in double triple also due sizes. control professionals suggest multiple when is very large. Hence an attempt has been made design develop new multi stage characteristics with unknown standard deviation. These useful characteristic that measured continuous scale sentencing large lot. efficiency measures plan derived designing methodology presented. Tables constructed selection parameters through levels.