1. Cause and Effect Graphing
Cause-Effect Graphing is a technique which starts with set of requirements and determines the minimum possible test cases for maximum test coverage which reduces test execution time and ultimately cost.
The goal is to reduce the total number of test cases still achieving the desired application quality by covering the necessary test cases for maximum coverage.
Cause and Effect

2. The Cause-Effect graph technique restates the requirements specification in terms of logical relationship between the input and output conditions.
Since it is logical, it is obvious to use Boolean operators like AND, OR and NOT.
Cause and Effect

3. Boolean Operators
Cause and Effect

4. Boolean Operators
Cause and Effect

5. Cause and Effect Diagram

6. Cause and Effect Diagram

7. Cause and Effect Diagram

8. (C1 ᴜ  C2)  ∩ C3
Cause and Effect

9. Cause and Effect

10. Cause and Effect

11. Event 1
Cause and Effect

12. Event 2
Cause and Effect

13. Event 3
Cause and Effect

14. Test cases
Cause and Effect

15. Test suite
Cause and Effect