Lesson learned in the IBL project

The ATLAS experiment is ready to face the Run II with improved tracking performance thanks to the installation of a new Pixel layer, also called Insertable B-Layer (IBL). The IBL has been installed in May 2014 located at only 3.3 cm radius from the beam axis and it is successfully taking data since the beginning of Run II in June 2015. An overview of the lessons learned during the IBL project will be presented, focusing on the challenges and highlighting the issues met during the production, the integration, installation and commissioning phases of the detector.