In most of our models we are using ALM. With this we promote structural changes from development into test/production model. Sometimes our dev/test model has messed-up data, which causing we can't do proper testing. To avoid this we sometimes delete the dev/test model (after all changes has been synchronized to production) and create a new dev/test model as a fresh copy of Production.
The down side of this is that all connections to other models or other models to the old test/dev are lost and needs to be redefined (edit mapping in source models).
It would be really handy that similar with promoting changes upwards in the DTAP street you would also be able to push data downstream the DTAP street. I can imagine this could only (technically) be possible if the models are on the same revision tag, however that is no problem at all.
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