1.2 Quality not Quantity
The answer is not necessarily volume but quality. In order to truly harness Development and Quality systems, Production Master data is critical. Selective transaction data is required, but only to facilitate subsequent business process testing. Unfortunately SAP does not separate master data from transaction data within the standard Basis toolset. Backup and restore and client copies either destroy work in progress or at the very least disrupt the IT support team. Usually this exercise is seen as an annual exercise due to the impact on resources.