István Forgács PhD is an entrepreneur, a test expert and an author. He is the co-author of the books Paradigm Shift in Software Testing, Practical Test Design and Agile Testing Foundations. He is the creator and key contributor of the codeless test design automation tool Harmony. He is the co-author of the website test-design.org. He with Attila Kovacs introduced three test design techniques: combinative testing, action-state testing and general predicate testing.