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TAR NC Implementation Document – Second Edition September 2017 |
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For quarterly standard capacity products
Seasonal factors for quarterly products are calculated as follows:
(a) Calculate the initial level of the seasonal factors by one of the following
alternatives:
Option 1:
Option 2:
is equal to any value within the minimum and
maximum range corresponding seasonal factors of the quarter.
Option 1 (arithmetic mean) is actually a sub-version of option 2 as the value will fall
into the same applicable range (between the lowest and highest value of the respec-
tive seasonal factors for the three relevant months in the quarter).
(b) Apply the steps (e) and (f) above as set out for monthly seasonal factors
taking into account the quarterly multiplier.