If a process specification for some process is 5+/-0.3 and the process standard deviation is 0.1, then process sigma level at which the process is operating (assuming, nominal specification is 5). JL Carpet roles of 100 feel long (and 20 feet wide) carpets. They inspected 50 randomly selected roles and found 4 non-conformances. Calculate 1) NPU, and 2) Throughput Yield of the process. Why is throughput simply not 92% (46/50=0.92)? If 400 units out of 50000 inspected were defective, at what sigma level is the company operating (assume the mean of the process can shift by 1.5 sigma). If process consists of two steps with throughput yield at each stage being 90% and 96%. What is the rolled throughput yield?