Take Off My Aviation Era

Ha ha?

　　 Hearing these two words, almost everyone is a little uncomfortable, what is it?

　　 So the gaze looking at Zhuang Jianye began to be full of suspicion, especially Peng Chuan and Master Cen, and said that this guy is not playing Tai Chi.

　　 If that is the case, it’s not so good.

Don't look at the two people making trouble in the cafeteria, but the two of them don't want to stab the matter to the factory leader. Needless to say, Peng Chuan is a "black house" waiting to be assigned. If he stabs him, he will not recruit the leader. See you, you have to leave in minutes.

　　 As for Master Cen, looking for Peng Chuan was originally not compliant and selfish. If he knew it would not mean hitting his head at the muzzle.

　　 If it weren't the case, how could the two of them who had torn their faces find someone else to judge, and they would have ran to the factory leader to file a complaint.

　　 But now the new college students don't say anything about each other, and they finally force the corner to come again. It's strange that the two of them are in good spirits.

However, just when people thought that Zhuang Jianye played Tai Chi and kicked the ball back intact, Zhuang Jianye gave a faint sound, then turned a few pages of manuscript paper, and then frowned and asked: "Is there any sampling plan? Use the constant test of the statistical list on "Commonly used methods of mathematical statistics"?"

　　 Peng Chuan, who was thinking that if Zhuang Jianye shied away, who should be called to judge, he was first taken aback when he heard this, and even after he realized what Zhuang Jianye was talking about.

　　 "Commonly used methods of mathematical statistics" is a mathematical statistics book compiled by the Statistics Group of the Institute of Mathematics of the National Academy of Sciences. In addition to teaching general mathematical statistical methods, it also includes a lot of commonly used statistical calculation lists.

　　 Therefore, many units involved in statistics, sampling and other application operations use it as a reference book.

Although Peng Chuan is not involved in this, he has participated in the sampling inspection of products in the factory several times. I have seen people use the constant calculation table above, so I am not unfamiliar, but he still shook his head and returned with a confident tone. : "The number of samples to be sampled is already the smallest. Naturally, it is the most cost-effective plan. Where else is it needed for testing."

　　 "The batch size of 2000, the number of samples of 33, and the number of scraps of 0, are you sure it is the most cost-effective?" Zhuang Jianye looked at Peng Chuan and asked.

　　 "Of course!" Peng Chuan responded quite neatly.

The supporters around him also secretly nodded. With the batch size of 2000, only 33 samples were selected, which is only 1.65% of the total. It is already considered a small sample that cannot be smaller. It is the most cost-effective one. Plan.

But Zhuang Jianye shook his head and turned his gaze to Peng Chuan: "If I were you, I would bring this value into the derivation formula for sampling inspection. After all, this rivet is scrapped after testing, so the cost per rivet is 12 For RMB, the unqualified rate is 2%. Using T=n+(N-n)[1-L(p)], after rough calculations, the cost is almost twelve thousand. Are you sure this cost is the least?"

　　As soon as this count was made, almost everyone around me took a breath, and light detection required 12 thousand. This cost was not low. You must know that the salary this year is only a few dozen yuan, and the cost of more than 10,000 is simply sky-high.

"No, our workshop requires more than 10,000 for each inspection, which makes our workshop almost smash the pot and sell iron." Before Peng Chuan spoke, the opposite Master Cen began to complain, and then looked at Zhuang Jianye eagerly: "Comrade, you have said so, is there any way to reduce the cost of inspection?"

　　Zhuang Jianye nodded: "Yes, yes, that is, the sampling statistics table in "Commonly Used Mathematical Statistics" is not too accurate, so I can only give you a rough reference."

　　 "No problem, as long as the cost can be lowered, refer to it." Master Cen agreed to it with one bite. Not only him, but other people watching the excitement are also looking forward to it.

You must know that the cost of sampling inspection is not just for the sixth branch, other branches and workshops have similar problems, so all of them stretched their necks and looked at Zhuang Jianye. At this moment, Zhuang Jianye had already taken out the pen in his jacket pocket and asked for a few pages. The canteen master reads the rest of the newspaper, and then calculates on it.

Soon a sampling test plan of 2000 batches, 165 samples, and 7 unqualified quantities was written on the side of the newspaper, and then Zhuang Jianye enclosed the three numbers in parentheses and brought them into the previous formula, resulting in 2486 This is a long sigh of relief.

　　 It should be this plan, which takes into account the coverage of the test while keeping the cost to a minimum.

　　 "Should the inspection reject rate be 0 to be the best value? How can it be the best if it is greater than 0?"

　　 When Zhuang Jianye said the formula for sampling inspection, Peng Chuan's face was a bit ugly. When Zhuang Jianye pushed the sampling plan and the final cost step by step according to the constant statistical table from the beginning, his face became even more pale.

I couldn't help shaking my head in disbelief. Obviously, he had deep doubts about Zhuang Jianye's calculations. Not only him, but Peng Chuan's supporters looked at Zhuang Jianye in confusion. The scrap rate was zero and the cost was tens of thousands. UU read www.uukanshu. The com scrap rate is 7, and the sample is overturned, but the cost is only two thousand four, which is more than four times lower. How can it be possible?

"It seems reasonable to artificially set the number of rejects as 0, but it must also be combined with the actual situation. In this example, if the unqualified rate reaches 7%, the Air Force accepts 10% of the output, so 0.02 divided by 0.07 equals 0.286. According to the constant In the sampling statistics table, the constant of this number should be 7, and so on, find the number of samples..."

　　 Looking at Peng Chuan and others, they weren't angry because they lost their face. Instead, they were a little bit of asking for advice in their doubts. Zhuang Jianye pointed to the tweet in the newspaper and explained the calculation method of sampling data to everyone.

　　 Of course, if these people did not understand, Zhuang Jianye would not know. Anyway, there is one who can be sure that he did not understand a sentence, that is, Master Cen.

　　Because he hadn’t finished the lecture, he started pointing at Peng Chuan’s nose and calling the other party and killed them in the entire workshop. Not only did he ask him to give an explanation, but he also asked the factory leader to comment.

This time, Master Cen and the others are not acting. With Zhuang Jianye's theoretical data, their courage has also strengthened. Although there is no direct evidence that Peng Chuan's sampling data has caused the high scrap rate in their workshop, the cost is more than two thousand. It is a great sin to be turned into more than 10,000, how can Master Cen let it go.

Peng Chuan is a knowledgeable person. As soon as he saw Zhuang Jianye’s rigorous derivation, he knew that he had made the mistake and went to his grandma’s house. Therefore, Master Cen did not resist him when he was pulling him. A mistake is a mistake. There is nothing to say, let alone. With so many people present, Peng Chuan could not do that shameless thing.

　　 So he lowered his head and let Master Cen drag him out, but at this moment, Zhuang Jianye stood up and asked abruptly at Master Cen who was about to leave, "Master Cen, are the rivet molds in your workshop not up to standard?"