The principle of using 2080 skillfully in the most

Skillfully use the 20/80 principle in the printing workshop

"80% of the revenue comes from 20% of the customers." This is the well-known Pareto's law, which accounts for 0.01% of the registered capital, also known as the 20/80 rule. "Most of them can only cause a little impact. A few of them can cause a major and significant impact.". Pareto's law is usually used to explain the distribution of wealth in society. Here we analyze the relationship between the quality problem of printing 151 high-density polyethylene wound structural wall pipe workshop and this famous theorem

first find out the defective products and waste products and their causes. After sufficient analysis, the causes of quality problems are sorted according to their importance, and the most important factor is ranked first. You may find that the top 20% causes 80% of the quality problems. As shown in Table 1 and table 2

Table 1: analysis of quality problems in the printing workshop by Pareto's law

quality defects ― printing press 1 ― printing press 2 ― printing press 3 ― printing press 4 ― total defective products

color deviation ― 550 ― 430 ― 234 ― 476 ― 1690

overprint inaccuracy ― 150 ― 27 ― 31 ― 265 ― 473 ―

white spots ― 50 ― 45 ― 80 ― 10? 185

print scratches?? 10?? 14?? 3?? 60?? 87

excessive dusting?? 16?? 21?? 30?? 5?? 72

others 30 37 21 30 118

Table 2: analysis of quality problems in the photographic workshop with Pareto's law causes of errors 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

worldwide More than half of the market share. According to Pareto's law, we can avoid 80% of the waste by solving the most important reason of 20%. Table 1 shows the most common problems and which equipment is most prone to problems. The data in the table indicates the number of times that a certain problem occurs in the equipment. From this, we can see that color deviation is the most important problem, and image registration ranks second. However, after careful analysis, the image registration problem of the establishment of ACTC R & D center mainly occurs on two printing presses (machines 1 and 4), etc. Through such analysis, we can roughly find out what the root cause of the problem is, and then seek solutions

source: Longjiang printing