Question
22. After 10 observations, what are the upper and lower control limits of an Exponentially Weighted...
22. After 10 observations, what are the upper and lower control limits of an Exponentially Weighted Moving Average (EWMA) chart for = 0.10 and L = 3? The distance from the center line to either of the control limits (upper or lower) is taken to be Loy, where zi is the il EWMA. Take the target value of the mean of the quality characteristic to be 10 and the population standard deviation of the quality characteristic to be 2.
Answers
Solution:- 1. Let, We have in EWMA chart, COL = ECZ:) al UCL = ECZ;) + L.S.E(71) Uc = u+L* CI-C1-1)*] LCL - ECZ;) - L.S ECZ:) LCL =M-L* (1-C1-3)*)** We have given, i=10, 0-0110, L-3, =10, 6'=2 . .C.L = M=10 UCL = 10+3 00:10) 61-C1-0110324344 2-0 -1073 0.05263 * 018784244 10+1:2900 = 11:29] JUCL Lc = 10 - 270o L.CL=8071
![Solution:- 1. Let, We have in EWMA chart, COL = ECZ:) al UCL = ECZ;) + L.S.E(71) Uc = u+L* CI-C1-1)*] LCL - ECZ;) - L.S ECZ:)](https://i.imgur.com/7sYogit.png)
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