Documentation for product support

I need to be able to draw up a list of the data that needs to be recorded for:

1. New software product releases
2. New software product versions

so that product support know what a new product does or what changes have been included in a new version, should a problem arise i.e. traceability. The list should not be too heavy as development are often under very tight time pressures and delay in fixing the next bug caused by creating documentation is not acceptable to management (yes I know!)