Audit of the Rail Production Database Nico Hilbert 13-Jul-07

Incorrect, incomplete, incoherent & missing data Triggers for the Audit Incorrect, incomplete, incoherent & missing data Including the statistically meaningful difference between a 0 value and a NULL value (“:” – unavailable or “-” not applicable) Incomplete, missing & ambiguous validation rules Incorrect interpretation of & ambiguities in the Guidelines Erroneous, incomplete & missing validation rules in the IT code 13-Jul-07 Name of the presentation

Main findings of the audit (1/2) 1) Many countries did (do) not provide all records in case of no “transport” (e.g. type of transport, type of good, etc.) 2) Incoherence of figures in Tables A7 and A8 in a number of cases TEU values also provided for intermodal transport units other than containers like “Semi-trailers (unaccompanied)”, “Road vehicles (accompanied)” and “Unknown” 13-Jul-07 Name of the presentation

Main findings of the audit (2/2) 3) In a number of cases the aggregated data was not equal to the sum of the corresponding detailed data Example: International=International-outgoing+International-incoming 2 cases: Total record missing, because not provided Examples: Total international transport or Total transport Total does not correspond to the sum of the related detailed data 4) Corrected, enhanced and new validation rules needed 13-Jul-07 Name of the presentation

2) TEU figures reported for ITUs other than containers Actions taken (1/3) 1) Missing records Detection of those not provided by the countries Insertion in the database with ‘0’ values Dissemination of the corrections 2) TEU figures reported for ITUs other than containers Related figures set to null (empty fields) by Eurostat 13-Jul-07 Name of the presentation

3) Missing or incorrect totals Actions taken (2/3) 3) Missing or incorrect totals Missing totals were identified calculated by Eurostat using the detailed data included in the database disseminated Incorrect totals were analysed in order to find an explanation for the difference countries were (will be) contacted if necessary corrected and included in the database 13-Jul-07 Name of the presentation

Incorrect, incomplete & missing validation rules Actions taken (3/3) 4) Validations rules Incorrect, incomplete & missing validation rules as well as incorrect, incomplete and missing validation rules implemented in the IT code were identified documented included or scheduled to be included in the IT code change requests 13-Jul-07 Name of the presentation

Thank you for your attention 13-Jul-07 Name of the presentation