# Question: A process is in control with x 100 s

A process is in control with x = 100.s = 1.05, and n = 5. The process specifications are at 95 ±

10. The quality characteristic has a normal distribution.

(a) Estimate the potential capability.

(b) Estimate the actual capability.

(c) How much could the fallout in the process be reduced if the process were corrected to operate at the nominal specification?

10. The quality characteristic has a normal distribution.

(a) Estimate the potential capability.

(b) Estimate the actual capability.

(c) How much could the fallout in the process be reduced if the process were corrected to operate at the nominal specification?

## Answer to relevant Questions

A process is in statistical control with x = 199 and R = 3.5. The control chart uses a sample size of n= 4. Specifications are at 200 ± 8. The quality characteristic is normally distributed. USL = 200 + 8 = 208; LSL = 200 ...Consider the loan processing cycle time data in Exercise 8.15. Set up an EWMA control chart for monitoring this process using = 0.1. Does the process seem to be in statistical control? x p50 18.05; p84 20.53; ...Apply the scale CUSUM discussed in Section 9.1.8 to the data in Exercise 9.1 Exercise 9.1 Consider a process with 0 = 10 and = 1. Set up the following EWMA control charts: (a) = 0.1, L = 3 (b) = 0.2, L = 3 (c) = 0.4, L = 3 Analyze the data in Exercise 9.1 using a moving average control chart with w = 6. Compare the results obtained with the cumulative sum control chart in Exercise 9.1. w = 6, 0 = 1050, = 25, CL = 1050, UCL = 1080.6, ...Post your question