The high-level tasks in this scenario are:
Configure Adaptive Server version 15.0 on the development system, duplicating the earlier release development configuration.
Migrate the development objects to the 15.0 development system.
Construct regression test suites.
Construct bcp scripts to move object deltas.
Create a baseling for the older test environment.
Configure a duplicate 15.0 server on the test platform.
Migrate the test/acceptance objects to the 15.0 test system.
Conduct regression test suites on the test system.
Verify synchronization of objects between the old and new release test systems.
Conduct user acceptance testing on the 15.0 test system.
Configure a duplicate 15.0 server on the production platform.
Migrate the production objects to the 15.0 production system.
Move the production users to the 15.0 production system.
Use your bcp scripts to resynchronize objects between the old and new release production systems.