Selective Laser Melting (SLM) is currently one of the most promising Additive Manufacturing (AM) processes. It is very attractive for automotive and aerospace sectors due to the ability to build complex geometries using high material efficiency. Components are built up layer-by-layer in a metal powder bed, which is selectively molten by a laser beam. Since currently the underlying physical phenomena are not fully understood, the modelling and simulation of the SLM process is important to the advancement of the SLM industry. The objective of this project is to develop a multi-scale modelling approach enabling the optimization of SLM process. The influence of both the process parameters and the powder material on the final part quality (part distortion, surface roughness, porosity, microstructure, etc.) can be assessed by numerical simulation. Nevertheless, the developed computational models need to be validated with rigorouslycontrolled experimental results.