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Vépole analysis is a graphical modeling of technical systems.

## Introduction

Vépole analysis is a graphical modeling of technical systems. This analysis is based on the Substance/field analysis (S-field), which is the acronym in Russian (“Vechestvo”-substance, and “pole”-field). Through the analysis of the model, we will be able to choose from the 76 standard solutions proposed by Altshuller.

## The principle

The Vépole model consists of 3 elements:

• The substance: It is the material object. It can be a simple element (a screw…), or complex (car…) that will be modified/transformed (screwed…).
• A field: It is the source of energy in the broad sense (gravity, chemical reaction…) which allows the action of transformation of the substance.
• The links: What connects the substance and the field. These links can be:

Satisfactory: It participates correctly in the realization of a function of the system.
Harmful: It generates inconvenience or participates in the realization of unwanted functions.
Excessive: These are useful interactions but the intensity is too important.
Insufficient: These are useful interactions but the intensity is too low.

## The minimum model

The realization of a function goes through the interaction between two substances, because to act, the field needs a second substance, then called the tool that does the action. Thus, for a system to be efficient, it must consist of at least two substances and a field1.

## The standards of resolution

The interest of substance-field modeling is to allow simple representation of problems, our contradiction. A contradiction involves the substances, the interactions and the fields which allow the realization of the function. This set Shape the system to be considered, with regard to the problem to be solved.

The interest of modeling is the existence of a tool to transform this graphical model of the problem into a graphical solution model: the resolution standards.

Altshuller has synthesized the standard methods used by designers in their work, and then built a dialectic of defining these standards. They are numbering 76. The goal of each standard being to move to one or more models of solutions. The standards are constructed in the Shape of recommendations, and generally formulated according to the following diagram:

If <Condition 1> And <Condition 2>Then <Recommendation>.

Both conditions allow to recognize the typology of the problem associated with the standard. Thus, for a problem model built, there are a number of recommendations for building the corresponding solution model.

The 76 standards are grouped into five classes that correspond to categories of problem typology. To select the right class, the process is as follows2 :

Example

After a puncture, the pressure in the tyre is no longer sufficient to support the rim. The Vépole modeling of this problem is as follows:

The tyre must support the rim in order to support the car, but the tyre cannot support the rim because the air pressure is insufficient.

Using the standard selection scheme, we get:
1. What is the need: Change the system, because a simple change could not answer and bring a sufficiently robust solution.
2. What is the magnitude of the change: small, because we do not wish to question the wheel and tyre system.
3. One of the standards of Class 2 is then used. By reading the different standards of Class 2, the 2.1.1 standards are the most telling. In fact, by adding a substance, we will be able to provide a solution to our problem.
4. We remodel our problem by applying standard 2.1.1. We get:

The PAX system is then developed. A flexible strip placed directly on the rim and which allows in case of puncture to continue to drive in deteriorating the car or jeopardize the safety.

## Source

1-Y. P. Salamatov (1999): TRIZ: The right Solution at the right Time, Insytec B. V., 90-804680-1-0, Hattem, the Netherlands.

2-Miller J, & al. (2001): Using the 76 Standard Solutions: A case Study for improving the World food supply