TRIZ is “a problem-solving, analysis and forecasting tool derived from the study of patterns of invention in the global patent literature”. It was developed by the Soviet inventor and science fiction author Genrich Altshuller and his colleagues, beginning in 1946. In English the name is typically rendered as “the Theory of Inventive Problem Solving)”, and occasionally goes by the English acronym TIPS.
Following Altshuller’s insight, the Theory developed on a foundation of extensive research covering hundreds of thousands of inventions across many different fields to produce a theory which defines generalisable patterns in the nature of inventive solutions and the distinguishing characteristics of the problems that these inventions have overcome.
An important part of the Theory has been devoted to revealing patterns of evolution and one of the objectives which has been pursued by leading practitioners of TRIZ has been the development of an algorithmic approach to the invention of new systems, and the refinement of existing ones.
The Theory includes a practical methodology, tool sets, a knowledge base, and model-based technology for generating new ideas and solutions for problem solving. It is intended for application in problem formulation, system analysis, failure analysis, and patterns of system evolution.
History
TRIZ in its classical form was developed by the Soviet inventor and science fiction writer Genrich Altshuller and his associates. He started developing TRIZ in 1946 while working in the “Inventions Inspection” department of the Caspian Sea flotilla of the Soviet Navy. His job was to help with the initiation of invention proposals, to rectify and document them and prepare applications to the patent office. During this time he realised that a problem requires an inventive solution if there is a unresolved contradiction in the sense that improving one parameter impacts negatively on another. He later called these “technical contradictions”.
His work on what later resulted in TRIZ was interrupted in 1950 by his arrest and sentencing to 25 years in the Gulag. According to one source the arrest was partially triggered by letters which he and Raphael Shapiro sent to Stalin, ministers and newspapers about certain decisions made by the Soviet Government, which they believed were erroneous. Altshuller and Shapiro were freed following Stalin’s death in 1953 and returned to Baku.
The first paper on TRIZ titled “On the psychology of inventive creation” was published in 1956 in “Issues in Psychology” (Voprosi Psichologii) journal.
By 1969 Altshuller had reviewed about 40,000 patent abstracts in order to find out in what way the innovation had taken place and developed the concept of technical contradictions, the concept of Ideality of a system, contradiction matrix, and 40 Principles of Invention. In the years that followed he developed the concept of physical contradictions, SuField Analysis, Standard Solutions, and several Laws of Technical Systems Evolution, and numerous other theoretical and practical approaches.
In 1971 Altshuller convinced The Inventors Society to establish in Baku the first TRIZ teaching facility called the Azerbaijan Public Institute for Inventive Creation and the first TRIZ research lab called The Public Lab for Inventive Creation. Altshuller was appointed the head of the lab by the Society. The lab incubated the TRIZ movement and in the years that followed other TRIZ teaching institutes were established in all major cities of the USSR. In 1989 the TRIZ Association was formed, with Altshuller chosen as President.
Following the end of the cold war, the waves of emigrants from the former Soviet Union brought TRIZ to other countries and drew attention to it overseas. In 1995 the Altshuller Institute for TRIZ Studies was established in Boston, USA.
Basic principles of TRIZ
TRIZ presents a systematic approach for analysing the kind of challenging problems where inventiveness is needed and provides a range of strategies and tools for finding inventive solutions. One of the earliest findings of the massive research on which the theory is based is that the vast majority of problems that require inventive solutions typically reflect a need to overcome a dilemma or a trade-off between two contradictory elements. The central purpose of TRIZ-based analysis is to systematically apply the strategies and tools to find superior solutions that overcome the need for a compromise or trade-off between the two elements.
TRIZ process for creative problem solving
By the early 1970s two decades of research covering hundreds of thousands of patents had confirmed Altshuller’s initial insight about the patterns of inventive solutions and one of the first analytical tools was published in the form of 40 Inventive Principles, which could account for virtually all of those patents that presented truly inventive solutions. Following this approach the “Typical solution” shown in the diagram can be found by defining the contradiction which needs to be resolved and systematically considering which of the 40 principles may be applied to provide a specific solution which will overcome the “contradiction” in the problem at hand, enabling a solution that is closer to the “ultimate ideal result”.
The combination of all of these concepts together – the analysis of the contradiction, the pursuit of an ideal solution and the search for one or more of the Principles which will overcome the contradiction, are the key elements in a process which is designed to help the inventor to engage in the process with purposefulness and focus.
One of the tools which evolved as an extension of the 40 Principles was a Contradiction Matrix in which the contradictory elements of a problem were categorized according to a list of 39 factors which could impact on each other. The combination of each pairing of these 39 elements is set out in a matrix (for example, the weight of a stationary object, the use of energy by a moving object, the ease of repair etc.) Each of the 39 elements is represented down the rows and across the columns (as the negatively affected element) and based upon the research and analysis of patents, wherever precedent solutions have been found that resolve a conflict between two of the elements the relevant cells in the matrix typically contain a sub-set of three or four Principles that have been applied most frequently in inventive solutions which resolve contradictions between those two elements.
The main objective of the contradiction matrix was to simplify the process of selecting the most appropriate Principle to resolve a specific contradiction. It was the core of all modifications of ARIZ till 1973. But in 1973, after introducing the concept of physical contradictions and creating SuField Analysis, Altshuller realized that the contradiction matrix was comparatively an inefficient tool and stopped working on it. Beginning ARIZ-71c contradiction matrix ceased to be the core of ARIZ and therefore was not a tool for solving inventive problems that Altshuller believed should be pursued. Physical contradictions and separation principles as well as SuField Analysis, etc became the core. Despite this, the 40 Principles has remained the most popular tool taught in introductory seminars and has consistently attracted the most attention amongst the tens of thousands of individuals who visit TRIZ-focused web sites in a typical month. Therefore, many of those who learn TRIZ or have attended seminars are taught quite wrongly that TRIZ is primarily composed of the 40 principles and contradiction matrix, the truth is ARIZ is the core methodology of TRIZ.
ARIZ is an algorithmic approach to finding inventive solutions by identifying and resolving contradictions. This includes the “System of Inventive Standards Solutions” which Altshuller used to replace the 40 principles and contradiction matrix, it comprises of Su-field modeling and the 76 Inventive Standards. A number of TRIZ-based computer programs have been developed whose purpose is to provide assistance to engineers and inventors in finding inventive solutions for technological problems. Some of these programs are also designed to apply another TRIZ methodology whose purpose is to reveal and forecast emergency situations and to anticipate circumstances which could result in undesirable outcomes.
One of the important branches of TRIZ is focused on analysing and predicting trends of evolution in the characteristics that existing solutions are likely to develop in successive generations of a system.
Essentials
Basic terms
- Ideal Final Result (IFR) – the ultimate idealistic solution of a problem when the desired result is achieved by itself;
- Administrative Contradiction – contradiction between the needs and abilities;
- Technical Contradiction – an inverse dependence between parameters/characteristics of a machine or technology;
- Physical Contradiction – opposite/contradictory physical requirements to an object;
- Separation principle – a method of resolving physical contradictions by separating contradictory requirements;
- VePol or SuField – a minimal technical system consisting of two material objects (substances) and a “field”. “Field” is the source of energy whereas one of the substances is “transmission” and the other one is the “tool”;
- FePol – a sort of VePol where “substances” are ferromagnetic objects;
- Level of Invention;
- Standard – a standard inventive solution of a higher level;
- Law of Technical Systems Evolution;
- ARIZ – Algorithm of Inventive Problems Solving, which combines various specialized methods of TRIZ into one universal tool;
Identifying a problem: contradictions
Altshuller believed that inventive problems stem from contradictions (one of the basic TRIZ concepts) between two or more elements, such as, “If we want more acceleration, we need a larger engine; but that will increase the cost of the car,” that is, more of something desirable also brings more of something less desirable, or less of something else also desirable.
These are called Technical Contradictions by Altshuller. He also defined so-called physical or inherent contradictions: More of one thing and less of the same thing may both be desired in the same system. For instance, a higher temperature may be needed to melt a compound more rapidly, but a lower temperature may be needed to achieve a homogeneous mixture.
An “inventive situation” which challenges us to be inventive, might involve several such contradictions. Conventional solutions typically “trade” one contradictory parameter for another; no special inventiveness is needed for that. Rather, the inventor would develop a creative approach for resolving the contradiction, such as inventing an engine that produces more acceleration without increasing the cost of the engine.
Inventive principles and the matrix of contradictions
Altshuller screened patents in order to find out what kind of contradictions were resolved or dissolved by the invention and the way this had been achieved. From this he developed a set of 40 inventive principles and later a Matrix of Contradictions. Rows of the matrix indicate the 39 system features that one typically wants to improve, such as speed, weight, accuracy of measurement and so on. Columns refer to typical undesired results. Each matrix cell points to principles that have been most frequently used in patents in order to resolve the contradiction.
For instance, Dolgashev mentions the following contradiction: Increasing accuracy of measurement of machined balls while avoiding the use of expensive microscopes and elaborate control equipment. The matrix cell in row “accuracy of measurement” and column “complexity of control” points to several principles, among them the Copying Principle, which states, “Use a simple and inexpensive optical copy with a suitable scale instead of an object that is complex, expensive, fragile or inconvenient to operate.” From this general invention principle, the following idea might solve the problem: Taking a high-resolution image of the machined ball. A screen with a grid might provide the required measurement. As mentioned above, Altshuler abandoned this method of defining and solving “technical” contradictions in the mid 1980’s and instead used Su-field modeling and the 76 inventive standards and a number of other tools included in the algorithm for solving inventive problems, ARIZ.
Laws of technical system evolution
Altshuller also studied the way technical systems have been developed and improved over time. From this, he discovered several trends (so called Laws of Technical Systems Evolution) that help engineers predict what the most likely improvements that can be made to a given product are. The most important of these laws involves the ideality of a system.
Substance-field analysis
One more technique that is frequently used by inventors involves the analysis of substances, fields and other resources that are currently not being used and that can be found within the system or nearby. TRIZ uses non-standard definitions for substances and fields. Altshuller developed methods to analyze resources; several of his invention principles involve the use of different substances and fields that help resolve contradictions and increase ideality of a technical system. For instance, videotext systems used television signals to transfer data, by taking advantage of the small time segments between TV frames in the signals.
Su-Field Analysis (structural substance-field analysis) produces a structural model of the initial technological system, exposes its characteristics, and with the help of special laws, transforms the model of the problem. Through this transformation the structure of the solution that eliminates the shortcomings of the initial problem is revealed. Su-Field Analysis is a special language of formulas with which it is possible to easily describe any technological system in terms of a specific (structural) model. A model produced in this manner is transformed according to special laws and regularities, thereby revealing the structural solution of the problem.
ARIZ – algorithm of inventive problems solving
ARIZ (Russian acronym of Алгоритм решения изобретательских задач – АРИЗ) – Algorithm of Inventive Problems Solving – is a list of about 85 step-by-step procedures to solve complicated invention problems, where other tools of TRIZ alone (Su-field analysis, 40 inventive principles, etc.) are not sufficient.
Various TRIZ software (see Invention Machine, Ideation International…) is based on this algorithm (or an improved one).
Starting with an updated matrix of contradictions, semantic analysis, subcategories of inventive principles and lists of scientific effects, some new interactive applications are other attempts to simplify the problem formulation phase and the transition from a generic problem to a whole set of specific solutions.
Use of TRIZ methods in industry
It has been reported that car companies Ford and Daimler-Chrysler, Johnson & Johnson, aeronautics companies Boeing, NASA, technology companies Hewlett Packard, Motorola, General Electric, Xerox, IBM, LG and Samsung, and Procter and Gamble and Kodak have used TRIZ methods in some projects.