In the context of TRIZ (Theory of Inventive Problem Solving), system evolution implies the resolution of contradictions, i.e., conflicts between a system and its environment or between the constituting elements of the system itself. The inventive solutions bringing a major contribution to the development of a technical system do not compromise between opposite requirements. Overcoming contradictions is thus a driving force behind technology evolution and their identification is the first step of any invention process.

The complete model of a contradiction comprehends three elements:

  • Two (2) Evaluation Parameters (EP) constituting a measure of system requirements satisfaction
  • One (1) Control Paramater (CP) whose value impacts, with opposite results, both the Evaluation Parameters.

A contradiction occurs when two evaluation parameters are coupled in such a way that the attempt of improving any of them (by acting on the control parameter) determines the worsening of the other. Classical TRIZ literature often distinguishes between Technical/Engineering and Physical contradictions, the former expressed just taking into account the Evaluation Parameters, and the latter focused only on the opposite requirements for a same Control Parameter.


Context: TRIZ


Driving contradiction

The driving contradiction is the Contradiction that determines evolution of a system within time.

For instance, the weight of transportation system has to be high for large-capacity vehicles to provide necessary strength and energy to move weighty cargo; but weight of transportation system has to be low for large-capacity vehicles to increase the portion of payload in overall weight of transportation system. In the other words, payload has to be greater than weight of transportation system.

Context: Researching Future


Contexts (Technological, Economic, Environmental, Social – TEES)

The surroundings, circumstances, environment, background or settings that determine, specify, or clarify the meaning of an event or other occurrences [ http://en.wiktionary.org/ ]


Technological context includes the following frameworks: Technological changes; Industrial structure; Machines and infrastructures used for specific purposes; Methods to design, produce, operate and decommission (getting rid of) machines and infrastructures;

relating to the application of scientific knowledge for practical purposes, especially in industry.


Economic context includes the following frameworks: Production context; Consumption issue, Transfer of wealth context; Economic Growth issue; Cost of products;

relating to the production and consumption of goods and services and the supply of money, but also relating to the careful management of available resources


Environmental context includes the following frameworks: Occupied space use; Natural resources use (material (air, water, soil, etc.), energy (fossil, renewable)); Environmental awareness (contaminations (air, water, soil), global warming, noise issues, light issues, odor); Safety for environment (plants, wild life, bio-diversity). Relating to the natural world and the impact of human activity on its condition


Social context includes the following frameworks: Public acceptance (safety issues, public opinion, etc.); Political issues (Security, Independence, Fiscal and Regulatory policies, Local and Global policies); Educational context (availability of information, available skills, knowledge, manpower capacity); Employment context.

Related to the development, structure, and functioning of human society


Context: Drivers & Barriers / FORMAT methodology

Competing technology

See Alternative Technology

Context: FORMAT methodology

Core team

Group of 4-6 specialists (analysts, users) that develop the forecast from the beginning until the end. Members of core team participate in all working sessions and coordinate activities with requested specialists and experts.

Context: FORMAT methodology


[1] Technology – Technology refers to methods, systems, and devices which are the result of scientific knowledge being used for practical purposes [Collins Cobuild]

[2] Economic means concerned with the organization of the money, industry, and trade of a country, region, or society [Collins Cobuild]
Economy – an economy consists of the economic system, comprising the production, distribution or trade, and consumption of limited goods and services between two agents, the agents can be individuals, businesses, organizations, or governments. [Wikipedia]