Operations Management Quiz 2

29 Questions | By Kilikika | Updated: Mar 22, 2022 | Attempts: 1364

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Questions and Answers

1.

Attributes (i.e. attribute data) must be measured rather than counted
- A.
  
  True
- B.
  
  False
2.

What type of error occurs when it is concluded that a process is not in control (i.e. not stable) when actually it is
- A.
  
  Type i error
- B.
  
  Type ii error
- C.
  
  None of the above
3.

If a sample result on a control chart falls outside one of the control limits, this suggests that the process output is non random (i.e. not in control) and should be investigated
- A.
  
  True
- B.
  
  False
4.

The two types of variation that a process could display are:
- A.
  
  Assign variation and random variation
- B.
  
  Assigned variation and random variation
5.

Which of the following is not an inspection point in manufacturing
- A.
  
  Raw materials and purchased parts
- B.
  
  Finished products
- C.
  
  Before a costly operation
- D.
  
  Before a covering process
- E.
  
  All of the above are inspection points
6.

For which of the following would a range (r) chart be used?
- A.
  
  Monitor process average
- B.
  
  Monitor process dispersion (i.e. width)
- C.
  
  Monitor the process fraction defective
- D.
  
  Monitor the number of defects
7.

The purpose of control charts is to
- A.
  
  Estimate the proportion of output that is acceptable
- B.
  
  Weed out defective items
- C.
  
  Determine if the output is within tolerances/specifications
- D.
  
  Distinguish between random variation and assignable variation in the process
- E.
  
  None of these
8.

A change in the process mean (i.e., process average) for a measured characteristic (i.e. variable data) would most likely be detected by a:
- A.
  
  P chart
- B.
  
  X bar chart
- C.
  
  C chart
- D.
  
  R chart
- E.
  
  None of the above
9.

Qualitative control
- A.
  
  Is appraisal of goods or services
- B.
  
  A process that evaluates output relative to a standard and takes corrective action when output doesn't meet standards
10.

Inspection
- A.
  
  Appraisal of goods or services
- B.
  
  A process that evaluates output relative to a standard and takes corrective action when output doesn't meet standards
11.

Inspection issues:1. how much to inspect and how often2. at what points in the process inspection should occur3. whether to inspect in a centralized or on site location4. whether to inspect attributes (i.e. count the number of times something occurs) or variables (i.e. measure the value of a characteristic)
- A.
  
  True
- B.
  
  False
12.

Quality of conformance
- A.
  
  A product or service conforms to specifications
- B.
  
  Statistical evaluation of the output of a process
- C.
  
  Natural variation in the output of a process, created by countless minor factors
13.

Statistical process control (spc)
- A.
  
  A product or service conforms to specifications
- B.
  
  Statistical evaluation of the output of a process
- C.
  
  Natural variation in the output of a process, created by countless minor factors
14.

Random variation
- A.
  
  Natural variation in the output of a process, created by countless minor factors
- B.
  
  Statistical evaluation of the output of a process
- C.
  
  A product or service conforms to specifications
15.

Assignable variation is in process output, a variation whose cause can be identified. a nonrandom variation
- A.
  
  True
- B.
  
  False
16.

Sampling distribution is a theoretical distribution of sample statistics
- A.
  
  True
- B.
  
  False
17.

Central limit theorem is the distribution of sample averages tends to be normal regardless of the shape of the process distribution
- A.
  
  True
- B.
  
  False
18.

Control chart is a time ordered plot of sample statistics, used to distinguish between random and nonrandom variablity
- A.
  
  True
- B.
  
  False
19.

Control limits is the dividing lines between random and nonrandom deviations from the mean of the distribution
- A.
  
  True
- B.
  
  False
20.

Type i error
- A.
  
  Concluding a process is in control when it is not
- B.
  
  Concluding a process is not in control when it actually is
21.

Type ii error
- A.
  
  Concluding a process in control when it is not
- B.
  
  Concluding a process is not in control when it actually is
22.

Variables generate data that are NOT measured
- A.
  
  True
- B.
  
  False
23.

Mean control chart is the control chart used to monitor the central tendency of a process
- A.
  
  True
- B.
  
  False
24.

Range control chart is used to monitor process dispersion
- A.
  
  True
- B.
  
  False
25.

P chart
- A.
  
  Control chart for attributes, used to monitor the number of defects per unit
- B.
  
  Control chart for attributes, used to monitor the proportion of defective items in a process