A Pareto chart is a graphical representation of the process problems , in ranging order of the most frequent , down to the least frequent , in descending order from left to right.
It is constructed under the Analyse phase in DMAIC methodology.
The left vertical axis of the Pareto chart shows the frequency of the number of defects for each defective category , and the right vertical axis shows the percentage of each defect of the total defects.
The bottom horizontal axis of the pareto chart is labelled with the group names of the responsive variables.
The Pareto Chart is the one of the Seven basic tools of Quality control.
What questions the Pareto Chart answers :-
1.) It tells us about that which is the most frequent occuring problem.
2.) Where to concentrate first..?
3.) Where should we focus first to achieve the greatest improvements..?
4.) What 20% of sources causing 80% of the problems
(80 /20 rule )..?
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