In the 1997 valuation, the VOA and NERA assumed that inland leased line prices would be rising with inflation. This assumption was not supported by the data on historic leased line prices which was subsequently released by BT, and these prices were assumed to remain constant in the context of the 2000 valuation. In the 2000 valuation, an allowance was made for additional outsourcing costs. (92) The combined effect of these factors meant that the final valuation was lower than that which had initially been calculated by the VOA in 1997.
Nende tegurite koosmõju tähendas seda, et lõplik hinnang oli väiksem sellest väärtusest, mille VOA arvutas 1997. aastal.