Digitec Galaxus AG, operator of the leading Swiss online shop, was about to begin initial operation of a comprehensive ERP system developed in-house. All the core processes were to be switched during regular operation into the new application logic, and all revenues had to be transferred to the new ERP system. In the final phase of the system development, the focus was on ensuring the businesscritical functions. Careful planning was necessary for the conversion of the business processes and the introduction of the new online shop. In addition, the organization of the business and development processes had to be adapted to the more complex parameters. The change project required intensive coordination and communication with a variety of stakeholders. In this delicate phase, Zühlke assumed responsibility for the overall management of the migration project and the team management of the internal business analysts.