The application as currently in use, is no longer being up to date and should be replaced by a user-friendly applications which - o.b.v. a certificate validated software - ensures that the underlying statistic is correct and applied without error. The model may be based on existing software, provided that, where appropriate configuration is satisfied by the specified conditions. The statistical model shows in the first instance in order to register a number of general data such as performer, date (period), matrix, type of samples, gear, ... It should be possible to get out of the calculation of the performance characteristics, in whole or in steps to enter e.g. by marking the desired performance characteristics