In 2020-21 ITER passed the point at which the delivery of components to the site was driving the schedule for the achievement of the first plasma. From now on, the schedule is driven by the process of assembling the components on site. The presentation will look back at the main steps in the design finalisation and manufacturing of the main magnet components between 2007 and 2022, and their relation to the project critical path. From 2020 magnet components have been accumulating on site at the same time as the tokamak machine assembly has started. After reviewing the main assembly achievements over the last 2 years, we will look at the scope, challenges and room for improvements for the future decade, until we achieve an operational tokamak.