Schedule Evolution of the Linac4 Installation During the Lifetime of the Linac4 Project and Connection Forecast

The new CERN linear accelerator Linac4 started the installation phase in 2010 after the delivery of the new building and tunnel by the civil engineering and was inaugurated six years later. It will be connected to the CERN accelerators chain and replace the current proton linear accelerator, Linac2, during the second long shut-down (LS2) of the Large Hadron Collider (LHC) in 2019. This paper aims to summarize the schedule evolution through the different phases of installation, from general services to machine installation, highlight the key factors that contributed to drive the schedule (safety, logistics and integration) and describe the coordination study of the future connection (integration, schedule, logistics, constraints and priorities).