- Bars sorted in descending order by whatever categories you're measuring
- Cumulative percent contribution line
|A proper pareto|
For example, lets say my boss at Acme Company says "You better reduce those defects by at least 75%". I look at my defect pareto and it clearly shows me that if I just address the top bar (scratches), I'm only addressing 43% of my problem. The percent contribution line immediately shows me that in order to close the entire 75% gap I have to address the top four pareto bars (this assumes I completely get rid of that defect type). Without the percent contribution line, I might have just gone off and fixed scratches then been left scratching my head trying to figure out why my boss was yelling at me!
My point here is don't forget that extra line on the pareto and don't let people tell you its not important.