Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 14CQ
Summary Introduction
To determine: The option that defines a robust process.
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Which of the following definitions describes a robust process?a. A process is robust if it can tolerate variation in input and environmental variableswithout producing a defect.b. A process is robust if it has a lot of automation built in.c. A process is robust if it uses control charts.d. A process is robust if its process capability index is greater than 1.
Which of the following statements is NOT true about the process capability ratio?
a.
The process capability ratio is a ratio for determining whether a process meets design specifications.
b.
The process capability ratio is computed as the difference of the upper and lower specification limits divided by six standard deviations.
c.
The process capability ratio is a ratio of the specification to the process variation.
d.
A capable process has a process capability ratio less than one.
A process screens a certain type of potash granule, resulting in a mean diameter of 0.067 cm and a standard deviation of 0.004 cm. The allowable variation in granule diameter is from 0.048cm to 0.087cm. Is the process capable?
a.
Cannnot be determined because sample size is not available
b.
Cannot be determined because USL and LSL information is not available
c.
Process is NOT capable
d.
Process is capable
Chapter 9 Solutions
Operations Management
Ch. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - Prob. 6CQCh. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - Prob. 14CQCh. 9 - Prob. 15CQCh. 9 - Prob. 16CQCh. 9 - Prob. 17CQCh. 9 - Prob. 18CQCh. 9 - Prob. 1PACh. 9 - Prob. 2PACh. 9 - Prob. 3PACh. 9 - Prob. 4PACh. 9 - Prob. 5PACh. 9 - Prob. 6PACh. 9 - Prob. 7PACh. 9 - Prob. 8PACh. 9 - Prob. 9PACh. 9 - Prob. 10PACh. 9 - Prob. 11PACh. 9 - Prob. 12PACh. 9 - Prob. 1CCh. 9 - Prob. 2C
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Which is an INCORRECT way to analyze the process capability of a process (on a particular quality characteristic) that is not normally distributed? a. Use Cp(q) b. None of those listed c. Transform the data to normal first and use the transformed data on indices such as Cp which work well on normally distributed data. d. Use Cpc e. Use Cpmkarrow_forwardiS Management Fall20 Random variation is also known as common cause variation. Select one: a. FALSE O b. TRUEarrow_forwardvariation is a variation whose cause cannot be identified. O a. Assignable O b. Random Controllable O d. Theoretical e. Statisticalarrow_forward
- A. Identify the Level of Measurement for each of the following variables Product satisfaction as “Very Unsatisfied, Fairly unsatisfied, until Very satisfied” Types of investments (Stocks, Bonds, others) Standardized exam score (e.g. Board exam score) Time (in minutes) it takes students to complete a statistics test Time to execute a command in a computer programarrow_forwardSince each process capability index relies on the estimate of process standard deviation, which in turns relies on sampling, therefore which following statement is INCORRECT? a. Confidence interval of each capability index should be found, instead of computing only a point estimate. b. Each process capability index follows some distribution. c. Each process capability index is a random variable. d. The distribution of Cpk is approximately normal. e. none of the abovearrow_forwardThe process capability index (Cp) may mislead if: (I) the process is not stable. (II) the process output is not normally distributed. (III) the process is not centered.arrow_forward
- John is a newly minted quality engineer at MakeStuff Inc. His boss tells him to increasethe process capability index of their main product. John is somewhat lazy and does notwant to tackle the variation in the process, so he decides to simply increase the upperspecification limit and reduce the lower specification limit. Does this increase the process capability index?a. No, it does not, because the variation in the process stays unchanged.b. Yes, it does, though one might question if the underlying process is really better.c. That depends on many other variables, including the control limits.d. No, the process capability index would only change if the control limits were changed.arrow_forwardAn industrial process that makes 3-foot sections of plasticpipe produces pipe with an average inside diameter of 1 inch and a standard deviation of .05 inch.a. If you randomly select one piece of pipe, what is the probability that its inside diameter willexceed 1.02 inches, assuming the population is normal?b. If you select a random sample of 25 pieces of pipe, what is the probability that the sample meanwill exceed 1.02 inches?μ = 1.00, σ = .05arrow_forwardWhich of the following statements is not true of Quality control? a. Quality control aims at detecting defects rather than preventing the defects. b. Quality control means the recognition and removal of identifiable causes and defects, and variables from the set standards c. The aim of quality control is to provide products which are dependable, satisfactory and economical. d. A quality control system is designed to ensure economical production of products of uniform quality which is acceptable to the customer.arrow_forward
- From a perspective of Statistical Process Control (SPC), a six-sigma process will have which of the following attributes? The USL and LSL will be separated by a distance of six sigma The process center will be aligned with the LSL The number of defects produced by the process will be 0.0018 parts per million All of the abovearrow_forwardWhich of the following best describes 'Control Charts'? Select one: a. They measure quality against the wants of the customer. b. They measure the stability of different processes by valuing costs. c. They determine causes of random variation. d. They measure situations of quality values against control limits to check stability of a process.arrow_forwardSuppose you are analyzing processing times for a machining operation. In your analysis, you found C, = 2.1 and Cpk = 1.28. Given this information, which of the following sigma levels is the highest that you could claim your process is capable of meeting? O 1 sigma O 2 sigma 3 sigma O 4 sigma 5 sigma O 6 sigmaarrow_forward
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