What testing design techniques do you know?

Main test design techniques:

• Equivalence Partitioning — dividing input data into classes of equivalent behavior to reduce the number of tests.
• Boundary Value Analysis — testing at the edges of equivalence classes where errors often occur.
• Cause-Effect Graphing — constructing a graph of causes and effects to generate tests.
• Decision Table Testing — using tables to describe conditions and actions, helping to cover all combinations.
• State Transition Testing — testing system behavior during transitions between states.
• Exploratory Testing — freely exploring the application without pre-prepared test cases.

Each technique helps to systematize testing and improve its effectiveness.