System Testing

System testing is designed to uncover weaknesses that were not found in earlier tests. This includes forced system failure and validation of the total system as it will be implemented by its user(s) in operational environment. Generally, it begins with low volumes of transactions based on live data. The volume is increased until the maximum level for each transaction type is reached. The total system is also tested recovery and fallback after various major failures to ensure that no data lost during the emergency. All this is done with the old system still operation. After the candidate system passes the test, the old system is discontinued.