With extensive experience in payroll outsourcing projects, like ADP Global View and other HR solutions, we've gained valuable insights for management and tools for those involved in such projects. Transferring data to new outsourcing providers often requires structured Excel tables, which they can quickly integrate into their systems. However, legacy systems produce differently structured data, especially with platforms like ADP Global View which aligns with SAP-HR-Infotypes. Even within two SAP-HR systems, disparities arise, necessitating the process of data cleansing, mapping, and transferring. Our tools, including MATCHMAKER and MAPPING-TOOL, streamline this process, providing a structured method to address challenges faced during data transfers from legacy to new systems. It's crucial for the company (the data owner) to supply accurate data to the outsourcing provider. This book is a comprehensive guide for our MATCHMAKER and MAPPING-TOOL software, designed to bridge gaps with template files, like the ADP Spread-Sheet-Loader and its 40+ sheets (SSL-infotypes). Our software aids HR professionals, project managers, and analysts in delivering quality data effortlessly and on schedule. Management recognizes the importance of adhering to project timelines to ensure a successful launch. MATCHMAKER and MAPPING-TOOL, with an Excel-like interface, empower even those with basic Excel knowledge to execute tasks typically reserved for programmers or analysts. Implementing these tools can boost team performance in such projects. This book, while supporting our software users and aiding on-the-job training, also offers guidance to management in such ventures.