Patent ID: 7930123
Filing Date: 2011-04-19
Classification: G05B,H01L,Y02P

Abstract:
1. A computer-implemented method for evaluating a sampling inspection, the method comprising: determining, by a processor, a first sampling plan to be inspected and a first condition for calculating a first acceptance variables variable of a lot; obtaining a first measured value of a production lot based on the first sampling plan; calculating the first acceptance variable based on the first measured value and the first condition; calculating a first acceptance probability based on the first acceptance variable; determining a second sampling plan to be inspected; determining a second condition for calculating a second acceptance variable of the lot by computing a linear combining function comprising obtaining a second measured value of the production lot based on the second sampling plan; calculating the second acceptance variable based on the second measured value and the second condition; calculating a second acceptance probability based on the second acceptance variable; calculating a first operating characteristic of the first sampling plan based on the first acceptance probability; calculating a second operating characteristic of the second sampling plan based on the second acceptance probability; determining an acceptable range of the first acceptance probability and an acceptable range of the second acceptance probability; and evaluating the first operating characteristic and the second operating characteristic by using the acceptable range of the first acceptance probability and the acceptable range of the second acceptance probability.