This article discusses the activities and challenges faced during the mobilisation phase of construction site. It covers the various tasks that need to be carried out during this phase, such as coordinating the preparation of the project handbook, generating a site layout plan, and establishing quality assurance and inspection regimes. The article also highlights some of the challenges faced during this phase, such as scope creep, poor communication, and lack of accountability. Finally, it provides tips on how to manage the mobilisation phase effectively.