King of Industry

  Chapter 577 The concept of SD law

  After understanding the meaning of Zhao Guoyang's words, Hassel nodded repeatedly and said: "Since this is the case, then it's the best. Then, Mr. Zhao, please enlighten me!"

  Zhao Guoyang waved his hands modestly and said: "Mr. Hassel is too polite, I will talk to you about the idea of ​​this evaluation plan..."

  In the conference room, Zhao Guoyang talked eloquently: "In my opinion, the subjective evaluation of the subjective evaluation method of ride comfort is to quantify or assign values ​​to psychological phenomena."

   "Whether it is the sensory inspection method, SD method, question paper method or qualitative measurement method, they are all built around this point..."

  Looking at Hassel, Zhao Guoyang said word by word: "My plan is actually a kind of SD method..."

  Hearing this, Jian Ning Kellerman, head of Skoda Auto’s public relations and communication, said with some doubts: "Mr. Zhao, what is the concept of this SD method. Can you explain it to us?"

  Zhao Guoyang nodded indifferently, and explained: "The so-called SD is the abbreviation of the English Semantic Differential Method, that is, 'Semantic Differential Method'."

"This method was originally proposed by Professor C.E.Osgood of the University of Illinois in the United States. It uses several adjective pairs related to an evaluation object as a scale benchmark to measure people's subjective responses after being stimulated by the object. "

  “When using this method, it is considered that the vibration characteristics of the vehicle body, the environment inside the vehicle, and the physiological and psychological conditions of the occupants are the four main factors that affect the ride comfort.”

  After listening to Zhao Guoyang's explanation, the participants of "Skoda Automobile Company" all showed a sudden look.

  Speaking of which, the "SD Law" was proposed two or three years ago.

  Because it is still in the stage of theoretical perfection, this method has not been popularized in the production scope of the global automobile industry, even in the industry, not many people know about it.

   Even Hassel, one of the biggest figures in the auto industry, doesn't know this method.

  The reason why Zhao Guoyang understands this method so well is naturally because of the memory of his previous life.

  After his theoretical explanation at this time, the bosses of "Skoda Automobile Company", no matter how much they know about technology, will never dare to despise him in the slightest.

Zhao Guoyang paused for a while, and then said: "In this plan, I tried to pass the road test of the real car, using the SD method in the psychometric method, taking the vibration of the vehicle body, the indoor environment, and the psychological and physiological conditions of the occupants as factors. content, a subjective evaluation of the car's ride comfort."

   "At the same time, I introduced the fuzzy measure and fuzzy integral in fuzzy theory, constructed a hierarchical model for the subjective evaluation of car ride comfort, and verified the applicability of the model."

  Zhao Guoyang raised his hand and gave an example: "My plan, when using the SD method for subjective evaluation, listed a questionnaire. The table listed 24 different adjective pairs."

  "These adjective pairs used as evaluation scales are determined based on the adjectives associated with the testers in the test through the preliminary test of ride comfort, and with reference to similar studies."

  When Zhao Guoyang said this, Hassel couldn't help asking his own questions.

   "Mr. Zhao, I don't know what you are investigating in this questionnaire? Can you give us a general explanation?"

  Zhao Guoyang nodded slightly and said: "This is no problem, I can tell you a little bit about it."

  “First, before passengers get on the bus, there are four things that need to be evaluated, namely: the environment inside the car, the vibration of the vehicle body, the physical condition of the evaluator, and the mental state of the evaluator.”

"After the appraiser got in the car, in my plan, I subdivided the interior environment into: narrowness, fresh air, seat softness, seat comfort, stuffiness in the car, backrest comfort, etc. Six items of investigation."

   "In addition, in terms of vibration, six items including vibration strength, vibration feedback delay, vibration softness, vibration rate, vibration rhythm, and vibration intensity have been added."

   "For the physical condition of the occupant, the plan also has six evaluation items, namely: heartbeat, energy, dizziness, vomiting, throat dryness, and fatigue."

   "Finally, my plan also includes six evaluation items for the psychological state of the passengers: degree of peace of mind, degree of tension, degree of joy, degree of impatience, degree of boredom, degree of comfort..."

   Speaking of this, Zhao Guoyang paused for a moment, and then continued: "Everyone should have seen it. My plan, after the passengers board the car, has a total of 24 evaluation points."

   "The combination of these points constitutes my SD method, a hierarchical model for the subjective evaluation of car ride comfort."

  After Zhao Guoyang's detailed narration, there was a sound of breathing in the meeting room.

  Indeed, even people who don’t understand the evaluation of car comfort at all will feel enlightened after hearing Zhao Guoyang’s proposal.

   Not to mention that the participants of the "Skoda Company" present here are all elite figures in the industry.

   Maybe there are not many people here who are engaged in technology, but everyone must have the ability to identify a good or bad solution.

  There is no doubt that Zhao Guoyang's "SD method", although according to his words, is still in the experimental stage, but its feasibility is undoubtedly quite strong.

  This point, you only need to look at the splendor on the face of the director of the R&D department Hassell, and you can guess it roughly.

  After Zhao Guoyang finished his narration, he nodded to the bigwigs present, and then sat down.

   After taking his seat, Zhao Guoyang was quite satisfied with his performance just now.

  Speaking of it, his "SD method" had been mentioned as early as when he was working on the "Iveco" project for "Jinling Automobile Group Company".

  Although there were not many opportunities to communicate with the technicians of Jinling Automobile Group, Zhao Guoyang did not fail to improve the method of evaluating the ride comfort of cars.

  When he first attended this meeting, Zhao Guoyang saw that the people from "Skoda" had a feeling of high self-esteem. After thinking about it for a while, he came up with his own theoretical "SD method" to give the other party a blow.

  Speaking of which, although Zhao Guoyang's method has not yet been finalized, the final success is already foreseeable.

   In terms of patent application, Zhao Guoyang greeted Li Kejian and Mr. Li early in the morning.

  Once it is finalized, immediately send this "patent" to Mr. Li in his own name, and he will send it to the National Patent Office for evaluation.

  According to Zhao Guoyang's own estimate, within two or three weeks, his patent can be officially formed and transferred to the application process.

  So for what he said just now, Zhao Guoyang is not worried at all about being copied by people from "Skoda Automobile Company".

   After Zhao Guoyang finished speaking, the conference room was silent for a while.

   After a while, Hassel let out a sigh of relief, clapped his hands and said, "Mr. Zhao, your 'SD method' is really novel and amazing!"

   "However, I have one more question about the adjective you said about the review..."

   "Mr. Hassel, please speak!" Zhao Guoyang stretched out his hand and made a "please" gesture.

  Hassel scratched his hair, and asked puzzledly: "Mr. Zhao, what I want to ask is, how did you design the adjective pairs used in your SD method? Are they all antonyms?"

   "Well, in principle it's all pairs of antonyms, such as good-bad, masculine-female."

  Zhao Guoyang shrugged and said: "In fact, one of the basic principles of the SD method is to subjectively evaluate the distribution of adjectives, and try to avoid putting adjectives with similar meanings together."

   "In addition, it should also avoid concentrating adjectives with good or bad impressions on the same side, that is, they should be properly dispersed and cross-distributed."

  Hassel nodded in relief, and asked a second question.

  He said thoughtfully: "Mr. Zhao, regarding the subjective evaluation model of ride comfort you built, what method did you use when you finally statistically analyzed the measurement results of the SD method?"

  Hearing that the boss asked such a key question, Zhao Guoyang secretly praised it in his heart.

   Indeed, building a model is only the first step in the subjective evaluation of ride comfort, and the final result still requires a large amount of data to be piled up before overall analysis.

  Although Hassel was only exposed to the "SD method" for the first time, he was able to point out the key points to the point, and his technical attainments were still very strong.

   After pondering for a moment, Zhao Guoyang explained: "Usually, the most commonly used method for the analysis of this model is factor analysis."

  “This method can be used to explain the phenomenon that occurs in a certain field with fewer intrinsic factors than the number of observed characteristics.”

   "Uh, factor analysis, I also know this! It is a method often used in evaluating the comfort of a car..." Hearing this, Hassel echoed.

Zhao Guoyang smiled slightly and continued: "Mr. Hassel is right. However, when analyzing with factor analysis, the average value of all evaluators is often used as the evaluation value of a certain evaluation object. It is easy to deviate from the actual situation.”

   "And when considering the joint effect of multiple factors, it is often affected by human factors such as the evaluator's personal experience, habits, current physical and psychological conditions, making the independence of several evaluation items not necessarily established."

   "In addition, due to the large personal differences among evaluators, if the average value of all evaluators is used as the evaluation value for calculation; it will inevitably lead to large errors."

Speaking of this, Zhao Guoyang smiled and said confidently: "So, I have added the method of 'fuzzy theory' to my evaluation plan to solve the problem of 'ambiguous' evaluation itself. question."

   "Fuzzy theory? What is that?" Hearing this, Skoda Larsen asked a question.

   Zhao Guoyang looked at the boss, and patiently explained: "Fuzzy theory and method is a mathematical theory and method developed in the past 30 years to deal with such 'ambiguous' phenomena and events."

   "Using fuzzy measure and fuzzy integral in fuzzy theory to build a subjective evaluation model of car ride comfort is also one of the core contents of my plan..."

  (end of this chapter)