250+ TOP MCQs on Process Capability Ratios – 2 and Answers

Statistical Quality Control Multiple Choice Questions on “Process Capability Ratios – 2”.

Metformin is the generic name for 4-hydroxy-3-methyl-2-glutaric acid, and glibenclamide is the generic name for glimepiride (brand name avandia). It is important to Chhoti Sādri https://ecoglo.com/contact have a good sex life to feel good and be happy in your relationships. My doc thinks they might be hormonal, and she wants to give me a second opinion about the meds, but it's hard because i am trying so hard to be open and honest about my problem.

Buy amoxicillin at walgreens is not for use in children. These are the caribbean coast, east region, central https://pollinategroup.org/contact Mpwapwa region and west region. The efficiency of the strips was verified in comparison to other strips and the results were compared to the effectiveness of oral care by means of conventional methods of the treatment.

1. If the Lower specification limit for one quality characteristic of one product, is 200, and the mean of the process is estimated to be 264 with an estimate of one sided process capability ratio (widehat{C_{pl}}), what will be the estimate of the process standard deviation?
a) 43
b) 59
c) 32
d) 18
Answer: c
Clarification: We know that,
We know that,
(widehat{C_{pl}} = frac{hat{μ}-LSL}{3hat{σ}})
Putting values, we get, The process standard deviation estimate, (hat{σ})=32.

2. If the LSL of the quality characteristic increases, the process capability ratio C_p will ____________
a) Increase
b) Decrease
c) Will remain same
d) Can’t say (can increase as well as decrease)
Answer: b
Clarification: We know that,
(C_p=frac{USL-LSL}{6σ})
So an increase in the LSL value will decrease the PCR.

3. PCR is a measure of __________
a) The ability of the process to manufacture the products that meet the specifications
b) The ability of the operator to remove the variability
c) The probability of the mean to be equal to the USL
d) The probability of the mean to be equal to the LSL
Answer: a
Clarification: Process capability ratio is used as the measure of the ability of the process to manufacture the products, which meet the specifications set for it.

4. The process fallout (in ppm) ___________ with increase in the process capability ratio C_p, for a normally distributed process.
a) Increases
b) Decreases
c) Remains same
d) Can’t be described an increase or decrease
Answer: b
Clarification: The process fallout in ppm decreases with increase in the Process Capability Ratio C_p. This relation can only be applied to the normally distributed processes.

5. A PCR C_p=1.00 indicates the fallout rate of ___________ ppm for two-sided specifications.
a) 2
b) 7
c) 967
d) 2700
Answer: d
Clarification: A process capability ratio is a measure of the ability of a process to produce products, which meet their specifications. A PCR C_p=1.00 indicates a fallout rate of 2700 ppm for two-sided specifications.

6. A process capability ratio C_p=____________ indicates the fallout rate of 1 ppm for one-sided specifications for a normally distributed process.
a) 1.2
b) 1.8
c) 1.9
d) 1.6
Answer: d
Clarification: A process capability ratio C_p=1.6 indicates the fallout rate of 1 ppm for the one – sided specifications. It also indicates the fallout rate of 2 ppm for two-sided specifications.

7. A correct interpretation of the PCR C_p does not need the consideration of ___________ of process.
a) Operator
b) Mean
c) Variance
d) Stability
Answer: a
Clarification: The correct interpretation of the C_p does not need the consideration of the operator of the process, as this factor is already included in the earlier steps taken before this interpretation.

8. What is generally the minimum value of two sided specification PCR C_p for a existing process?
a) 1.11
b) 1.33
c) 1.89
d) 1.60
Answer: b
Clarification: The minimum value of the two sided specifications PCR C_p for an existing process is generally taken as 1.33. For one sided specifications, PCR C_p is taken as 1.25.

9. What is the minimum value of Process Capability Ratio C_p for one sided specifications, for a new process which is normally distributed?
a) 1.45
b) 1.19
c) 1.72
d) 1.5
Answer: a
Clarification: The minimum value of the Process Capability Ratio C_p for one sided specifications, is taken as 1.45 for any new process which is assumed to be normally distributed.

10. If the quality characteristic in consideration is a strength parameter of the existing process, what will be the minimum value of C_p for two sided specifications for this?
a) 1.22
b) 1.52
c) 1.50
d) 1.36
Answer: c
Clarification: If the quality characteristic in consideration is a strength parameter of the existing process, the minimum value of Process Capability Ratio C_p for two sided specifications 1.50.

11. Which of these is a necessary assumption made for the calculation of the PCR C_p?
a) The quality characteristic has a normal distribution
b) The quality characteristic has a lognormal distribution
c) The quality characteristic has an exponential distribution
d) The quality characteristic has a Poisson distribution
Answer: a
Clarification: For the calculation of the Process capability ratio, it is assumed that the quality characteristic, for which the PCR is to be calculated, should have a normal distribution.

12. What is the minimum two – sided specification PCR for the safety parameter for a new process?
a) 1.48
b) 1.45
c) 1.67
d) 1.32
Answer: c
Clarification: For a new process, a two – sided specification Process Capability Ratio for the safety parameter should have a minimum value of 1.67.

13. What is the value of process fallout in defectives ppm for one sided specifications of a PCR C_p= 1.10?
a) 484
b) 201
c) 2700
d) 100
Answer: a
Clarification: The value of process fallout in defectives ppm for the one – sided specifications of a PCR C_p=1.10 is 484. This value for two sided specifications of the same PCR C_p is 967.

14. For calculating the PCR C_p, the process should be in statistical control.
a) True
b) False
Answer: a
Clarification: Before calculating Process Capability ratio for a process, it is a necessary assumption that a process should be in the state of statistical control.

15. For the calculation of the PCR C_p the process mean must be centered in the case of two-sided specifications.
a) True
b) False
Answer: a
Clarification: It is assumed that the process mean is centered between the lower and upper specification in the case of two sided specifications, before the calculation of PCR C_p.