"80% of revenue comes from 20% of customers." This is Pareto's Law, which is very familiar
The 20/80 rule “Most, they can only cause a small amount of influence. A few, they cause a major, significant impact
Rang ". Pareto's law is usually used to explain the distribution of wealth in society, here we analyze the printing workshop
The relationship between the quality problem and this famous theorem.
First find out the defective and scrap products and their causes. After sufficient analysis, it will cause quality problems
The reasons are sorted according to their importance, and the most important factor comes first. You may find
The top 20% causes 80% of quality problems. As shown in Table 1 and Table 2.
Table 1: Using Pareto's Law to Analyze the Quality Problems in the Printing Workshop
Quality defects? Printing machine 1? Printing machine 2? Printing machine 3? Printing machine 4? Total defective quantity
Color cast? 550? 430? 234? 476? 1690
Overprint is not allowed? 150? 27? 31? 265? 473
White spot? 50? 45? 80? 10? 185
Print scratches? 10? 14? 3? 60? 87
Too much dusting? 16? 21? 30? 5? 72
Others? 30? 37? 21? 30? 118
Table 2: Using Pareto's Law to Analyze the Quality Problems in the Photo Workshop
The cause of the error? Camera 1? Camera 2? Camera 3? Total defective quantity
Wrong size? 2? 5? 3? 10
Exposure? 20? 40? 12? 72
Development? 30? 40? 25? 95
Contrast? 5? 10? 0? 15
Film error? 10? 5? 0? 15
According to Pareto's law, we can avoid the 80% waste by solving the 20% most important cause
Free. Table 1 shows the most common problems, and which equipment is most prone to problems, the data in the table indicates that
The number of times the device has a certain problem. From which we can see that color cast is the most important issue,
The image registration ranks second, but after careful analysis, the problem of image registration mainly appears on two printing machines (1
And machine 4), etc. Through such analysis, you can roughly find out what is the source of the problem, and then
Seeking a solution.
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