Which of the following is true regarding Pareto diagrams?
  a.They display the individual and cumulative frequency of quality issues, defects, or problems.
  b.They provide a framework for a manager to analyze the problems that contribute to the occurrence of defects.
  c.Quality control issues are displayed in order of least to most frequent.
  d.They graphically display the impact of measuring goalpost conformance.
  Answer:A
  Choice "A" is correct. Pareto diagrams combine the elements of a histogram of quality control issues displayed in order of most to least frequent with a line graph that displays the cumulative occurrence of the problems.
  Choice "d" is incorrect. Control charts measure conformance of operations within a standard range known as a goalpost (an upper or lower limit).
  Choice "b" is incorrect. Cause and effect (fishbone) diagrams typically analyze problems that contribute to the occurrence of defects. Pareto diagrams measure the cumulative impact of identified quality issues.
  Choice "c" is incorrect. On a Pareto diagram, quality control issues are displayed in order of most to least frequent.