Pages

Six Sigma Course Practice Test Q&As 19

Question: The major decision variables in equipment selection are:
  Flexibility
  Labor requirements
  Manufacturer
  Both A and B
  Both B and C
  Both A, B and C

Show or Reveal the Answer

Both A and B

Key Points: Manufacturer (Choice C) is a factor to consider under decision variable initial investment.

Question: The last stage in the operations consulting process is:
  Presenting final report
  Implementing changes
  Assuring client satisfaction
  Assembling learning from the stage
  None of the above

Show or Reveal the Answer

Assembling learning from the stage

Key Points: Options A to C are stages 5 to 7 respectively. Option D is the 8th or last stage.

Question: The category given the maximum point value in the Baldrige award is:
  Strategic planning
  Customer and market focus
  Business results
  Process management
  Human resource focus

Show or Reveal the Answer

Business results(450 points).

Key Points: The maximum point values for the other categories (A, B, D, and E) are 85.

Question: ABC is considering opening a drive-through window for customer service. Management estimates that customers will arrive at the rate of 10 per hour. The teller who will staff the window can service customers at the rate of one every four minutes. Assume Poisson arrivals and exponential service. The average number in the system is:
  3
  2
  1
  0
  4

Show or Reveal the Answer

2

Key Points: The computation is as follows: 10/(15-10) = 2 customers

Question: Which of the following statements is not true about six-sigma quality?
  six-sigma results in less than 3.4 ppm defects
  six-sigma is equivalent to a process capability of Cpk = 2.0 when the process is centered
  six-sigma corresponds to design tolerances that are + 3 standard deviations on either side of the mean
  Motorola invented the term "six-sigma quality" in the mid-80s.
  All the above statements are true

Show or Reveal the Answer

six-sigma corresponds to design tolerances that are + 3 standard deviations on either side of the mean

Key Points: Six-sigma corresponds to a +6 (and not 3) standard deviations on either sides of the mean

Question: Which of the following most closely describes net material requirements?
  gross requirements - planned order receipts
  gross requirements - planned order releases
  gross requirements - on-hand + planned order receipts
  gross requirements - on-hand - planned order receipts
  none of the above

Show or Reveal the Answer

gross requirements - on-hand - planned order receipts

Key Points: Net requirement = Gross requirement on-hand - planned order receipts

Question: Which of the following is not an element of a good service guarantee?
  Unconditional
  Easy to understand and communicate
  Painless to invoke
  Ensures the firm makes a profit
  Meaningful to the customer

Show or Reveal the Answer

Ensures the firm makes a profit

Question: The basic difference between product and process layout pertains to:
  Product mix
  Equipment used
  Pattern of workflow
  Line configuration
  Batch size

Show or Reveal the Answer

Pattern of workflow
Key Points: The other options are also differences but the basic difference is the pattern of workflow.

Question: Which MRP system input element specifies how many and when the firm plans to build each end item?
  Capacity planning
  Bills of material
  Inventory records file
  Master production schedule
  none of the above

Show or Reveal the Answer

Master production schedule
Key Points: Inventory records files keep track of the status of inventory. A bill of materials contains the information to identify each item and the manner in which it is assembled because each identification signifies the component of the item. Capacity planning is not an input to an MRP system.

Question: The advantage(s) of work sampling compared to time study include all the following EXCEPT:
  No timing devices are required
  Work of long cycle time may be studied with a fewer observer hours
  The study may be temporarily delayed at any time with little effect
  Several work-studies may be conducted simultaneously by one observer
  Provides a complete breakdown of elements

Show or Reveal the Answer

Provides a complete breakdown of elements
Key Points: Time study provides a complete breakdown of elements.

Question: When you have a bell-shaped curve, none of the five M’s or one P are:
Bell shaped curve and 5m's and one p
  Causing variation
  Influencing or affecting the process in any way
  Acting in a random fashion
  Unduly influencing the process

Show or Reveal the Answer

Unduly influencing the process

Question: The peak of the bell-shaped curve represents:
  The standard deviation
  Process sigma
  The width or fatness of the shape of the distribution
  The mean or average of the distribution

Show or Reveal the Answer

The mean or average of the distribution

Question: The basic tools for shop-floor control include:
  Dispatch list
  An input/output control report
  Various status and exception reports
  A and B
  B and C
  A, B, and C

Show or Reveal the Answer

A, B, and C
Key Points: These are all basic shop-floor control tools.

Question: The gross requirements of a given component part in an MRP system are determined from:
  gross requirements of the immediate part
  net requirements of end item
  net requirements + on-hand
  planned order releases of the end item
  planned order releases of the immediate parents

Show or Reveal the Answer

planned order releases of the immediate parents
Key Points: B and D are determined after the gross requirements, A and C are not valid answers.

Question: Which of the following is true about MRP Systems?
  lot sizing is EOQ
  order philosophy is replenishment
  demand pattern is random
  based on independent demand
  objective is to meet manufacturing needs

Show or Reveal the Answer

objective is to meet manufacturing needs
Key Points: MRP is based on dependent demand. The other options are applicable to independent demand items.

Question: What should a histogram tell you?
I. Whether or not the data are normally distributed
II. Customer expectations
III. The dispersion
IV. The central tendency
  I, III, and IV only
  III and IV only
  I and II only
  I, II, III, and IV

Show or Reveal the Answer

I, II, III, and IV

What is an advantage of using a histogram over a stem-and-leaf?
What should a histogram tell you?
What should be included in a capability study?
A major drawback of using histograms to control a process is that histograms: