Operations Management Quiz 2

29 Questions | Total Attempts: 892

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Operations Management Quiz 2

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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

  • 26. 
    C 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

  • 27. 
    Specification is a range of acceptable values established by engineering design or customer requirements
    • A. 

      True

    • B. 

      False

  • 28. 
    Process variability is natural or inherent variability in a process
    • A. 

      True

    • B. 

      False

  • 29. 
    Process capability is the inherent variability of process output relative to the variation allowed by the design specification
    • A. 

      True

    • B. 

      False