Statistical Quality Control Practice Test 8

1. What is the value of the one-sided lower cusum of the standardized cusum chart?

2. Combined Cusum-Shewhart procedure is applied _____________

3. After the value of C_i^- increasing than the value of _____ the process is said to be out-of-control.

4. What is the center line value of the EWMA charts?

5. The control limits of EWMA charts do not depend on the sample number when the sample number becomes quite large.

6. The EWMA charts are recommended for phase II applications as it is totally a nonparametric procedure.

7. What is the value of L=2.27 upper control limit for a EWMA chart which has value of λ=0.10 and the value of the standard deviation σ=1 and the value of μ₀=10?

8. What will be the value of the UCL for a control chart, which has the value of λ=0.10, L=2.7, σ=1 and μ₀=10? The value of i can be assumed quite large.

9. What is the expression for the two sided cusum ARL?

10. The largest standard deviation of the sample mean from the target, not leading to an immediate out-of-control signal, is called _______________ of a control chart.