Why sometimes new IT systems can fail to deliver what was intended?

New IT systems can fail to deliver intended outcomes due to inadequate requirements gathering, leading to a misalignment between user needs and system capabilities. Poor change management and resistance from employees can hinder adoption and effective use of the system. Additionally, insufficient training and support can result in users not fully utilizing the system's features, ultimately impacting its effectiveness. Lastly, technical issues or lack of integration with existing systems can further derail the intended benefits.