Foreword: ATS 2022

Welcome to the 31th Asian Test Symposium (ATS 2022). Since 1992, ATS has been held every year in various Asian cities as the largest symposium that focuses on testing of integrated circuits and systems. Many researchers and engineers from all over the world have attended the past symposia and enjoyed discussions. After more than two years of COVID-19 pandemic, ATS 2022 is being held as a hybrid event to invite symposium participants to join on-site meeting, and also to allow on-line participation through conference app platform.