The item which shows inferior quality cause and circumstance () stratification such as the number and loss amount of inferior goods doing, the figure which you display in the bar graph which it arranges into the order whose value is large shows the cumulative percentage in the line graph. QC7 one of instruments.
Inferior quality most being something which shows the fact that little defective item has occupied, at the time of problem solving improvement is used the occasion where it judges some item the importance.
Compilation procedure in pareto diagram is as follows.
1. It totals defective cause and phenomenon in every item, it lines up into occurrence number of cases and the order where the loss amount is large, the substitution ? ?
2. You sum up the number of cases of item to the order, the accumulation composition ratio for all the item totals (%) you calculate
3. In every item number of cases in the bar graph, accumulation composition ratio the map is done in the line graph
Ranking Item Number of cases Composition ratio Accumulation
Number of cases Accumulation
Composition ratio
1 Scratch 35 35.4% 35 35.4%
2 Distortion 32 32.3% 67 67.7%
3 Sled 15 15.2% 82 82.8%
4 Twist 7 7.1% 89 89.9%
5 Coloration malfunction 3 3.0% 92 92.9%
6 Bending 2 2.0% 94 94.9%
7 Crack 2 2.0% 96 97.0%
8 Strength insufficiency 1 1.0% 97 98.0%
9 Foreign material mixture 1 1.0% 98 99.0%
10 Quality defectiveness 1 1.0% 99 100.0%
Total 99 - - -
Example in the tabulation which becomes the base in the pareto diagram
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