Appendix 2: Reporting basis continued
Comparability
Each parameter to be reported has accurately been defined in the Safety Standards & Procedures and Environmental Standards & Procedures.
The comparability of the data depends on the extent to which estimates have been used in determining the performance indicators. Where estimates have been used in interpreting trends, it is stated in the text of this report. The comparison of data has been carried out over a three year period in order to limit the influence of incidental fluctuations.
Since no material changes have been made to definitions, calculations or estimating procedures, there is comparability from year to year, except when indicated in the text of this report.
