TriZ with notes (1)

1 Contradictions:
For systems, contradiction is a system conflict model, which is to embed incompatible requirements into the functional characteristics of conflicting parts. In a larger context, the contradiction can also refer to the philosophical sense of contradiction, that is, between the system or within the system of the opposite nature of the function or function. But in the technology system between the system, the system and the environment or the system components of the uncoordinated, can also be seen as a contradiction-demand contradiction. Because a technical system exists because its system functions meet some of our needs (physical or mental), the contradiction of the technical system is certainly much lower than the philosophical level of contradiction (limited to the technical systems that meet our needs), but the definition is much looser, As long as the system components do not meet the requirements of incompatible, can be called the contradiction of the technical system.

In a system, there are many factors of contradiction, any two or more factors may form a contradiction, will form a contradiction network, but in order to solve the problem of simplification, we need to start from the simplest contradiction model. The simplest Paradox model is the two-dollar model-the incompatible contradiction model with only two factors. Through the combination of the two-dollar model, we can also describe the contradiction network formed by any number of factors.
There are two basic scenarios for incompatibility:
A) a factor that adapts to and supports the main function (positive or negative) of the system, but another factor does not adapt to the function, or even hinders the function (the adverse factor);
It should be noted that in the system, a factor is a positive or negative factor is not absolute, need to according to our needs-the function of the specific analysis.
B) Both factors are positive factors, but they require specific resources and cannot be used concurrently.
This contradiction is often produced in the case of the exclusive demand for resources (space, time).

2 Categories of contradictions
   A) technology-economic contradictions (technical characteristics-cost)
   B) process--technical contradiction (technical characteristics-product complexity)
         A and B are collectively referred to as management contradictions. In TriZ, many times, we transform A and B into technical or physical contradictions to analyze and dissolve.
   C) technical contradictions (compatibility of functions)
         in TriZ, Technical contradiction generally refers to the contradiction between the two functional parameters (incompatibility). The technical contradiction can be described by a two-dollar model, which reflects the incompatibility between the different functional characteristics of one or several elements in the contradiction, such as the speed requirement and the security requirement in the automobile system.
   D) physical contradictions (compatibility of feature conditions)
        in TriZ, Physical contradictions often refer to the two opposing requirements of the same function parameter. To cite a popular example is Marca fast, hay. It should be noted that in the analysis of physical contradictions must be able to eliminate the moral (especially in the analysis of social systems) interference, need to be whimsical.
        in the system, physical contradictions are often more difficult to solve than technical contradictions. The analysis of the physical contradiction needs to be closely surrounding the four physical aspects of the technical system: space, time, structure and material.

3 Ideal Function model
There is a proverb called, only unexpectedly did not do, we in the analysis of a system function, intuitive often not easy to get system contradictions (especially some more mature products, often will make people feel very perfect, there is no place to improve, this time is often for innovative inventors, It's easy to walk into a dead end of thinking. This is especially important for traditional products such as shoes, clothes, etc.). We can do this by using the backward-push method: First assume that we have a perfect system (ideal solution), and then analyze if you want to implement this ideal system (ideal solution), which requires the function of the object (environment, system or system component) to construct the ideal functional model. According to the ideal function model, the contradiction of real system is deduced. The construction of an ideal functional model can help innovators out of the dead end of their thinking. Of course, when building the ideal functional model, we need to: on the one hand, the closer the reality is better, on the other hand, try not to be limited by the existing technical conditions or resources.
An ideal function: This function only has a positive effect and has no negative effect.

In the necessities of human life, there is no product that cannot be improved and innovated, all we need to do is broaden our horizons. The information age, interdisciplinary, interdisciplinary thinking and vision are the basic qualities that every technical person should have.

TriZ with notes (1)