Compute the upper and lower control limits if samples of size 4
are to be used.
UCL=
LCL=
Compute the upper and lower control limits if samples of size 8
are to be used. (Round your answers to three decimal places.)
UCL=
LCL=
Compute the upper and lower control limits if samples of size 16
are to be used.
UCL=
LCL=
A process is in control and normally distributed with ?
control chart limits of 45 and 15. The subgroup size is 4. Suppose
the process variance suddenly triples while process mean remains
unchanged. What is the probability that the first subsequent
subgroup average will fall outside the control limits? What are the
? probability and ARL? Suppose the process variance suddenly
triples while process mean shifts downward to 10. What are the β
probability and ARL now?
Suppose that a control chart is used to monitor ? ̅ where the
control limits are set to 3?? ̅ and the warning limits are set to
2?? ̅. Answer the following: (a) If the false alarm cost per
occurrence is $1000. What is the expected false alarm cost every
100 samples. (b) If the warning inspection cost is $100. What is
the expected warning inspection cost every 100 samples. (c) Suppose
the current sample size of 10 is quadrupled,...
Miller Inc. has decided to use a p-Chart with 3-sigma control
limits to monitor the proportion of defective metal shafts produced
by their production process. The quality control manager randomly
samples 150 metal shafts at 14 successively selected time periods
and counts the number of defective metal shafts in the sample.
Step 1 of 8: What is the Center Line of the control chart? Round
your answer to three decimal places.
Step 2 of 8: What value of z should...
Which of the following statements about the upper and lower
control limits of a control chart is true?
Group of answer choices
The upper and lower control limits for a p chart depend on the
sample size.
The lower control limit of a p chart will ALWAYS be a negative
value.
The upper control limit of an X-bar chart does NOT depend on the
average range R-bar.
The upper and lower control limits of an R chart are always the...
A process using a p-chart with L=3 has an in-control fraction
defective of p=0.01. Sample size is 300. What is the probability of
detecting a shift to an out-of-control value of p=0.05 for the
first time on the second sample following the shift?
A process is in statistical control with and
The control chart uses a sample size of n = 3.
Specifications are at 42 ± 4. The quality characteristic
is normally distributed.
What conditions should we check to ensure that conclusions from
a capability analysis are correct?
Estimate the potential capability of the process.
Estimate the actual capability of the process.
How much improvement in ppm could be made in process
performance if the mean could be centered at the nominal
value?
Refer to Table S6.1 - Factors for Computing Control Chart Limits
(3 sigma)
LOADING...
for this problem.
Sampling
44
pieces of precision-cut wire (to be used in computer assembly)
every hour for the past 24 hours has produced the following
results:
Hour
Bold x overbarx
R
Hour
Bold x overbarx
R
Hour
Bold x overbarx
R
Hour
Bold x overbarx
R
1
3.153.15 "
0.650.65 "
7
3.053.05 "
0.580.58 "
13
3.113.11 "
0.800.80 "
19
4.514.51 "...
Refer to Table S6.1 - Factors for Computing Control Chart Limits
(3 sigma) LOADING... for this problem. Sampling 4 pieces of
precision-cut wire (to be used in computer assembly) every hour
for the past 24 hours has produced the following results:
Hour Bold x overbar R Hour Bold x overbar R Hour Bold x overbar R
Hour Bold x overbar R 1 3.15" 0.65" 7 2.95" 0.58" 13 3.11"
0.80" 19 3.41" 1.66" 2 3.10 1.18 8 2.75 1.08 14...