Pareto Analysis helps problem solvers separate the vital few from the trivial many. Make a pareto chart based on your analysis so far. Simply roughing one out on notebook paper is fine. In our lab example, if we eliminate the top two most frequent causes and fix them will have eliminated approximately of the total occurrences of our problem $($late lab results$).$ We can see this value on the of a Pareto Chart

$45\%,$ upward sloping line

$65\%,$ upward sloping line

$85\%,$ second vertical bar

$99\mathrm{.}5\%,$ last vertical bar