In one of my first jobs after studying I had a brief stint in a systems control role. The job was essentially to test that our production systems were producing accurate outputs. This involved working with large excel based test packs (each row being a unique test case) which we passed through a mechanical testing system. We then compared the results of the test system to the results from the production system.

A lot of people have been asking why insurers don't do full medical checks upfront before they issue a policy, rather than at claim stage. Sorry, another thread. 1/ The primary job of initial underwriting is to determine if an applicant can get insurance, and on what terms. The outcome can be either an acceptance on standard terms, a decline in cover or an acceptance with a premium loading or exclusions