This topic focuses on introducing Building Information Modeling (BIM) from the perspective of a modeller, emphasizing how digital models form the backbone of modern construction workflows. It explains the transition from traditional 2D drafting to intelligent 3D modeling, where every element carries data such as materials, dimensions, and performance information. Modellers learn how BIM improves coordination between disciplines, reduces errors, and supports decision-making throughout the project lifecycle. The foundation also covers BIM standards, model organization, and the role of the modeller in ensuring accuracy, consistency, and compliance with project requirements.