Regression tests refer to repeated testing to ensure the software behaviour did not change during development. For instance, new changes or functionality could sabotage already tested and working functions. With Arttest you can easily compare previous test results with new test result data to ensure software changes did not introduce new faults.
Moreover, test results from different test layers can be checked against each other, e.g. MIL against SIL data. The result of this comparison or regression test is a new test result itself, which can be used for report generation and review tasks.