IT and facility managers are increasingly confronted with the need to quickly provide additional capacity without jeopardizing IT availability. In addition, they must be sure that what they buy today is suitable for tomorrow's growth. It must therefore be a sustainable investment that does not need to be written off unnecessarily due to incorrect future-proofing. This is important for the reliability of the facility, but also for effective budget management. Prefab and modular growth scenarios can contribute to this.