Data Migration Planning involves gathering all the information available to develop a Strategy and Plan for the Data Migration Activities. What can and cannot be planned is dependent on what stage of the project the data migration resources are engaged. Ideally Data Migration Resource should be engaged as soon as a solution is proposed. Work can commence on analysing and profiling potential source systems. This will help define the scope and potential issues with with source data, such as data quality and the source of truth for data elements.