TRIZ

TL;DR

TRIZ: Most engineering problems reduce to a contradiction — improving one parameter worsens another. TRIZ provides 40 inventive principles derived from 400,000 patents that resolve common contradiction types. Instead of compromising between conflicting requirements, TRIZ finds solutions that eliminate the contradiction entirely. It turns "you can't have both" into "here's how you can."

What Is TRIZ?

TRIZ was developed by Genrich Altshuller, a Russian engineer, inventor, and science fiction writer, who began the foundational research while working in the Soviet Navy's patent bureau in 1946. By the time of his death in 1998, Altshuller and his colleagues had analysed over 400,000 patents across dozens of engineering disciplines to identify recurring patterns in how inventive problems are solved.

The central discovery was that most inventive problems involve a contradiction: improving one technical parameter (speed, strength, size) degrades another. The history of engineering innovation is largely the history of resolving these contradictions — not through compromise but through principles that eliminate them. And these principles, Altshuller found, recur. The same inventive principles that resolved contradictions in ship design in 1890 were used in aircraft design in 1940 and semiconductor design in 1990.

The core TRIZ toolkit includes:

40 Inventive Principles: recurring strategies for resolving technical contradictions
Contradiction Matrix: a lookup table mapping pairs of conflicting parameters to the most applicable inventive principles
ARIZ (Algorithm of Inventive Problem Solving): a detailed problem-solving process for severe contradictions
Substance-Field Analysis: a modelling tool for analysing technical system interactions
Ideality: the concept of the Ideal Final Result (IFR) — the system performs its function without existing

How It Works

The Basic TRIZ Process:

Step 1: Define the problem specifically
  — What are you trying to improve?
  — What gets worse when you improve it?

Step 2: Formulate the contradiction
  — Technical Contradiction: "When I improve [Parameter A], [Parameter B] worsens"
  — Physical Contradiction: "The system must be [property] AND [opposite property]"

Step 3: Find inventive principles (for Technical Contradiction)
  — Identify which of the 39 engineering parameters are in conflict
  — Look up the contradiction matrix for that pair
  — Review the 3-4 suggested inventive principles

Step 4: Apply principles to your specific problem
  — Each principle is abstract; apply it to your specific context
  — Generate multiple solution concepts from each principle

Step 5: Define the Ideal Final Result
  — IFR: The system accomplishes the function by itself,
    without additional components, without cost, without side effects
  — Work backward from ideal to feasible

Step 6: Evaluate and develop solutions
  — Apply standard engineering analysis to generated concepts

Selected Inventive Principles (from the 40):

Segmentation: Divide an object into independent parts
Extraction: Extract only the useful or harmful part
Local quality: Transition from homogeneous to heterogeneous
Dynamics: Make an object adjustable or optimal at each stage
Inversion: Invert the action; turn it upside down
Transition into another dimension: Move into a higher/lower dimension
Phase transitions: Use phase change phenomena

Three Real-World Examples

Ships and Ice: Segmentation Principle

Problem: Icebreakers need to be strong (to break ice) and lightweight (to travel fast). These contradict: heavy ships break ice better but travel slowly; light ships travel fast but can't break thick ice.

TRIZ identified Segmentation as a relevant principle: divide the problem into independent parts. Solution: Instead of one ship optimised for both functions, use two separate vessels — a powerful icebreaker that clears the path and a faster cargo ship that follows. The ice-breaking function and the cargo-transport function are handled by segmented, specialised systems. No compromise required.

NASA Thermal Tiles: Composite Structures Principle

Problem: Space shuttle tiles need to withstand extreme heat (ceramic properties) but also be light and not brittle (metal/polymer properties). A single material can't satisfy both.

TRIZ's Transition into Another Dimension and Composite Materials principles: Use a multi-layer structure — insulating ceramic outer layer, structural tile body, attachment adhesive layer — each layer optimised for its specific function. The contradiction between heat resistance and structural flexibility was resolved by assigning each requirement to a different layer rather than requiring one material to satisfy both.

Bicycle Helmet: Dynamics and Phase Transition Principle

Problem: Helmets need to be rigid during impact (protection) but flexible/compact for carrying (convenience). Hard helmets protect well but are bulky; foldable helmets are convenient but less protective.

TRIZ's Dynamics principle: make the object change state based on need. The Hövding airbag helmet (2012) is soft and comfortable normally but deploys a gas-filled hood on impact detection — rigid only when protection is needed. The phase transition from soft to rigid (via gas inflation) eliminated the rigidity-convenience contradiction.

When to Use It

✅ TRIZ is most valuable for:

Technical engineering problems with clear performance contradictions
Incremental innovation has stalled; need a step-change approach
Industrial design, manufacturing process improvement, materials science
Patent-around problems (find non-obvious solutions to avoid prior art)

❌ Less suited for:

Non-technical creative problems (business model innovation, marketing)
Problems without clear contradictions
Very early-stage exploration without a defined technical challenge
Teams without engineering background (full TRIZ has a steep learning curve)

Pairs well with	Why
First Principles	Both seek to eliminate constraints rather than accept trade-offs
Morphological Analysis	Morphological Analysis maps the solution space; TRIZ identifies the breakthrough within it
Biomimicry	Both look outside the problem domain for solutions; TRIZ looks at patents, Biomimicry at biology
Constraint Relaxation	TRIZ resolves contradictions; Constraint Relaxation questions whether constraints are real

Common Misuses and Limitations

Skipping to the 40 principles without formulating the contradiction. The inventive principles are most useful when mapped to a specific contradiction. Applying them randomly without identifying the contradiction first produces low-quality output.

Treating TRIZ as only for hardware engineering. TRIZ was developed for technical systems but has been adapted to business, software, and service design. TRIZ tools like the 40 Principles and Ideality apply wherever there are system contradictions.

Full ARIZ without training. The full ARIZ algorithm is extremely complex — Altshuller himself revised it 7 times. Attempting ARIZ without training typically produces poor results. The simpler tools (contradiction matrix, 40 principles, IFR) deliver 80% of TRIZ's value with a fraction of the learning investment.

Expecting automatic solutions. TRIZ generates principles and directions, not finished solutions. The 40 principles are abstract; applying them to a specific problem still requires domain expertise and engineering judgment.

Model	Relationship
First Principles	Both eliminate assumed constraints; TRIZ provides a taxonomy of how contradictions are resolved
Morphological Analysis	Complementary systematic innovation tools; Morphological Analysis explores solution space; TRIZ finds breakthrough points
Biomimicry	Both are cross-domain innovation methods; TRIZ from engineering patents, Biomimicry from biology

Frequently Asked Questions

Is TRIZ still relevant in the age of AI and simulation?

Yes. AI and simulation accelerate design iteration within an existing solution space; TRIZ helps identify which solution space to explore. A simulation that tests 10,000 variations of the same design concept will not find a solution that requires a fundamentally different approach. TRIZ is more complementary to than replaced by AI: TRIZ identifies the conceptual direction, AI/simulation optimises within it. Several AI tools now incorporate TRIZ principles to guide generative design.

Where should a beginner start with TRIZ?

Start with three tools in order: (1) The Ideal Final Result — always ask "what does the perfect solution look like, ignoring feasibility?" before generating practical ideas; (2) The 40 Inventive Principles — study these as a vocabulary of solution types, especially the 10–12 most commonly applicable; (3) The Technical Contradiction formulation — practice identifying "when I improve X, Y worsens" in everyday engineering problems. These three tools deliver most of TRIZ's accessible value without the steep learning curve of the full methodology.

How many patents did Altshuller actually analyse?

Altshuller began with 40,000 patents in the late 1940s. By the time of his death, the analysis had been expanded by colleagues and successors to approximately 400,000 patents. Modern TRIZ researchers have extended this to over 2 million patents and have begun applying machine learning to identify patterns across even larger datasets. The fundamental findings (40 principles, contradiction matrix) have remained stable across this expansion, validating the original analysis.

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This page is part of the MindMax Mental Models Knowledge Base.

What Is TRIZ?​

How It Works​

Three Real-World Examples​

Ships and Ice: Segmentation Principle​

NASA Thermal Tiles: Composite Structures Principle​

Bicycle Helmet: Dynamics and Phase Transition Principle​

When to Use It​

Common Misuses and Limitations​

Related Models​

Frequently Asked Questions​

Further Reading​

Apply with AI​