What is the business issue?

Errors in a production program frequently come from erroneous data contained in the database itself.  In order to reproduce a problem in a development environment, it is necessary to have this erroneous data available. Retrieving a complete copy of all the production data is extremely costly in disk space and processing time, and the incomplete extraction of a subset of data may cause data integrity issues. Additionally, as your test data is manipulated, this data needs to be repeatedly refreshed.