Introduction to Basic I-TRIZ
 I-TRIZ Foundations
 Levels of Invention
 Inventive Problem
   Psychological Inertia
   Contradictions
 Patterns of Invention
   Analogical Thinking
   Directions
 Patterns of Evolution
 Ideality
   Ideal System
   Ideal Vision
   Functional Modeling
   Local Ideality
 Resources
   Derived Resources
   Insufficient Resources
 Problem Solving
 Brainstorming
 Ideation Process

Directions

Patterns of invention (operators) are grouped into Directions for changing the system.

Example of Direction - Inversion: "Think the opposite." Invert something in the system by applying the operators listed below.

Make movable parts immobile
Apply an opposite action
Replace a sequence of operations
Inside-out or upside-down
Replace external action with internal
Instead of heating use cooling