1. Introduction: What is PBD and Why Quality Assurance? Pentaksiran Berasaskan Sekolah (PBS) has evolved into Pentaksiran Berasaskan Sekolah (PBD) —a continuous, holistic, and authentic assessment method implemented in Malaysian schools. However, for PBD to be valid and reliable, a strict Quality Assurance (Penjaminan Kualiti) mechanism is essential.